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Hiroki Tsuchiura

Section

Graduate School of Engineering

Job title

Associate Professor

Degree

博士（工学）（大阪大学）
修士（理学）（新潟大学）

researchmap

https://researchmap.jp/read0116580

J-GLOBAL ID

200901072950639155

Research History 4

2007/04 - 2009/03

東北大学大学院工学研究科　助教
2004/03 - 2007/03

東北大学大学院工学研究科　助手
2002/10 - 2004/03

International School for Advanced Study
2009/04 -

東北大学大学院工学研究科　准教授

Committee Memberships 1

ISRN Condensed Matter Physics　Editorial Board

2011/07 - Present

Professional Memberships 1

日本物理学会

Research Interests 5

第一原理計算
磁性および磁性材料
トポロジカル物質の理論
永久磁石の保磁力機構
強相関電子系における超伝導

Research Areas 1

Natural sciences / Magnetism, superconductivity, and strongly correlated systems /

Awards 2

2014 Highly Cited Article, Journal of the Physical Society of Japan,

2015/04　The Physical Society of Japan
財団法人トーキン科学技術振興財団研究奨励賞

2006/03/13　財団法人トーキン科学技術振興財団　ナノスケール不均一電子状態による銅酸化物超伝導体の異常物性

Papers 128

Anisotropy in magnetoelastic effects in YCo5 Peer-reviewed

Phys. Rev. Materials　8　2024/11/04

DOI： 10.1103/PhysRevMaterials.8.114403 　
Josephson effects between the Kitaev ladder superconductors Peer-reviewed

Osamu Kanehira, Hiroki Tsuchiura

SciPost Physics Proceedings　(11)　014　2023/06/06
Publisher: Stichting SciPost
DOI： 10.21468/scipostphysproc.11.014 　

eISSN： 2666-4003

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The two-leg ladder system consisting of the Kitaev chains is known to exhibit a richer phase diagram than that of the single chain. We theoretically investigate the variety of the Josephson effects between the ladder systems. We consider the Josephson phase difference \theta between these two ladder systems as well as the phase difference \phi between the parallel chains in each ladder system. The total energy of the junction at T = 0 is calculated by a numerical diagonalization method as functions of \theta, \phi, and also a transverse hopping t_{\perp} in the ladders. We find that, by controlling t_{\perp} and \phi, the junction exhibits not only the fractional Josephson effect for the phase difference \theta, but also the usual 0-junction and even \pi-junction properties.
Field-direction Dependence of Majorana-mediated Spin Transport Peer-reviewed

Hirokazu Taguchi, Akihisa Koga, Yuta Murakami, Joji Nasu, Hiroki Tsuchiura

Proceedings of the 29th International Conference on Low Temperature Physics (LT29)　2023/05/22
Publisher: Journal of the Physical Society of Japan
DOI： 10.7566/jpscp.38.011152 　
Multimodal analysis of Zr substitution effects on magnetic and crystallographic properties in (Sm1−Zr )(Fe0.8Co0.2)12 compounds with ThMn12 structure Peer-reviewed

S. Kobayashi, D. Ogawa, X.D. Xu, Y.K. Takahashi, A. Martin-Cid, K. Ishigami, Y. Kotani, M. Suzuki, T. Yoshioka, H. Tsuchiura, H. Sepehri-Amin, T. Ohkubo, K. Hono, S. Hirosawa, T. Nakamura

Acta Materialia　242　118454-118454　2022/10
Publisher: Elsevier BV
DOI： 10.1016/j.actamat.2022.118454 　

ISSN： 1359-6454
Ab initio study on the possible magnetic topological semimetallic state in MnMg₂O₄ Peer-reviewed

S. Tomita, D.-P. Yao, H. Tsuchiura, K. Nomura

AIP Advances　12　(3)　035331-035331　2022/03/15
Publisher: AIP Publishing
DOI： 10.1063/9.0000317 　

eISSN： 2158-3226

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We study the electronic state of an inverse spinel compound MnMg₂O₄ based on first-principles calculations. The high-spin state is realized in Mn ions on the diamond lattice, resulting in that this material is found to be a half-metallic semimetal with the minority spin-gap about 3eV, and also with line nodes in the Brillouin zone. The intrinsic anomalous Hall conductivity (AHC) is also computed as a function of the chemical potential of the system assuming the rigid band structure, and is found to exhibit a peak structure with a maximum value of 200 S/cm at only 15 meV above the Fermi level. The relation between the large AHC and Berry curvature in the Brillouin zone is also discussed.
Rare-earth moment reduction and local magnetic anisotropy in Pr2Fe14B and Tm2Fe14B Peer-reviewed

Hiroto Sato, Takuya Yoshioka, Hiroki Tsuchiura, Yoshiyuki Mizuno, Kunihiro Koike, Kohki Takahashi, Hiroaki Kato

Journal of Magnetism and Magnetic Materials　545　168684-168684　2022/03
Publisher: Elsevier BV
DOI： 10.1016/j.jmmm.2021.168684 　

ISSN： 0304-8853
First-principles Calculations of Magnetic Properties for Analysis of Magnetization Processes in Rare-earth Permanent Magnets Invited Peer-reviewed

Hiroki TSUCHIURA, Takuya YOSHIOKA, Pavel NOVÁK, Johann FISCHBACHER, Alexander KOVACS, Thomas SCHREFL

Journal of the Japan Society of Powder and Powder Metallurgy　69　(Supplement)　S118-S125　2022/01/30
Publisher: Japan Society of Powder and Powder Metallurgy
DOI： 10.2497/jjspm.69.s118 　

ISSN： 0532-8799

eISSN： 1880-9014
Effect of element doping and substitution on the electronic structure and macroscopic magnetic properties of SmFe12-based compounds Peer-reviewed

Takuya Yoshioka, Hiroki Tsuchiura, Pavel Novák

Physical Review B　105　(1)　2022/01/03
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevb.105.014402 　

ISSN： 2469-9950

eISSN： 2469-9969
Theoretical investigation of electronic structure and orbital moment of the Sm ions in SmFe₁₂ using generalized gradient approximation Theoretical Investigation of Electronic Structure and Orbital Moment of the Sm Ions in SmFe12 using Generalized Gradient Approximation +U MethodU$ method

Shogo Yamashita, Takuya Yoshioka, Hiroki Tsuchiura, Pavel Novak

2022 Joint MMM-Intermag Conference (INTERMAG)　2022/01
Publisher: IEEE
DOI： 10.1109/intermag39746.2022.9827808 　
First-principles calculations of magnetic properties for analysis of magnetization processes in rare-earth permanent magnets Invited Peer-reviewed

Hiroki Tsuchiura, Takuya Yoshioka, Pavel Novák, Johann Fischbacher, Alexander Kovacs, Thomas Schrefl

Science and Technology of Advanced Materials　22　(1)　748-757　2021/09/07
Publisher: Informa UK Limited
DOI： 10.1080/14686996.2021.1947119 　

ISSN： 1468-6996

eISSN： 1878-5514
Reduction of Nd moments and local magnetic anisotropy in Nd2Fe14B single crystals Peer-reviewed

H. Sato, Y. Kubo, T. Yoshioka, H. Tsuchiura, Y. Mizuno, K. Koike, K. Takahashi, H. Kato

AIP Advances　11　(2)　025224-025224　2021/02/10
Publisher: AIP Publishing
DOI： 10.1063/9.0000148 　

eISSN： 2158-3226
Finite-temperature magnetic properties of Sm2Fe17Nx using an ab initio effective spin model Peer-reviewed

Shogo Yamashita, Daiki Suzuki, Takuya Yoshioka, Hiroki Tsuchiura, Pavel Novák

Physical Review B　102　(21)　2020/12/28
Publisher: American Physical Society (APS)
DOI： 10.1103/PhysRevB.102.214439 　

ISSN： 2469-9950

eISSN： 2469-9969
Statistical and analytical approaches to finite-temperature magnetic properties of the compound SmFe12 Peer-reviewed

Takuya Yoshioka, Hiroki Tsuchiura, Pavel Novák

Physical Review B　102　(18)　2020/11/10
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevb.102.184410 　

ISSN： 2469-9950

eISSN： 2469-9969
Influence of local lattice structure on magnetic properties in Y2Fe17 compounds Peer-reviewed

Jun-ichiro Inoue, Takuya Yoshioka, Hiroki Tsuchiura

Physical Review Materials　4　(11)　2020/11/04
Publisher: American Physical Society (APS)
DOI： 10.1103/PhysRevMaterials.4.114404 　

eISSN： 2475-9953
High-temperature dependence of anomalous Ettingshausen effect in SmCo5-type permanent magnets Peer-reviewed

Asuka Miura, Keisuke Masuda, Takamasa Hirai, Ryo Iguchi, Takeshi Seki, Yoshio Miura, Hiroki Tsuchiura, Koki Takanashi, Ken-ichi Uchida

Applied Physics Letters　117　(8)　082408-082408　2020/08/24
Publisher: AIP Publishing
DOI： 10.1063/5.0023111 　

ISSN： 0003-6951

eISSN： 1077-3118
Magnetic anisotropy constants of ThMn12-type Sm(Fe1–Co )12 compounds and their temperature dependence Peer-reviewed

D. Ogawa, T. Yoshioka, X.D. Xu, Y.K. Takahashi, H. Tsuchiura, T. Ohkubo, S. Hirosawa, K. Hono

Journal of Magnetism and Magnetic Materials　497　165965-165965　2020/03

DOI： 10.1016/j.jmmm.2019.165965 　

ISSN： 0304-8853

eISSN： 1873-4766
Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets Peer-reviewed

Asuka Miura, Hossein Sepehri-Amin, Keisuke Masuda, Hiroki Tsuchiura, Yoshio Miura, Ryo Iguchi, Yuya Sakuraba, Junichiro Shiomi, Kazuhiro Hono, Ken Ichi Uchida

Applied Physics Letters　115　(22)　222403　2019/11

DOI： 10.1063/1.5131001 　

ISSN： 0003-6951
The coexisting state of the staggered flux and d-wave superconducting order in a t-J type model Peer-reviewed

S Fukuda, K Yamazaki, H Tsuchiura, M Ogata

Journal of Physics: Conference Series　1293　012026-012026　2019/09
Publisher: IOP Publishing
DOI： 10.1088/1742-6596/1293/1/012026 　

ISSN： 1742-6588

eISSN： 1742-6596
Magnetic Properties in the Metallic Magnets with Large Anisotropy Peer-reviewed

Yojiro Taguchi, Joji Nasu, Akihisa Koga, Takuya Yoshioka, Hiroki Tsuchiura

Journal of Low Temperature Physics　196　(1-2)　321-326　2019/07

DOI： 10.1007/s10909-019-02200-y 　

ISSN： 0022-2291

eISSN： 1573-7357
Elastic and Magnetoelastic Properties of Fe-Rich Tetragonal Y–Fe Compounds: Phenomenology and Electron Theory Peer-reviewed

Jun-Ichiro Inoue, Takuya Yoshioka, Hiroki Tsuchiura

IEEE Transactions on Magnetics　55　(2)　1-4　2019/02

DOI： 10.1109/tmag.2018.2865542 　

ISSN： 0018-9464

eISSN： 1941-0069
Site-specific magnetic anisotropies in R2Fe14B systems Peer-reviewed

T. Yoshioka, H. Tsuchiura

Applied Physics Letters　112　(16)　162405　2018/04/16
Publisher: American Institute of Physics Inc.
DOI： 10.1063/1.5018875 　

ISSN： 0003-6951
Magnetic tunnel junctions with an equiatomic quaternary CoFeMnSi Heusler alloy electrode Peer-reviewed

Lakhan Bainsla, Kazuya Z. Suzuki, Masahito Tsujikawa, Hiroki Tsuchiura, Masafumi Shirai, Shigemi Mizukami

Applied Physics Letters　112　(5)　052403　2018/01/29
Publisher: American Institute of Physics Inc.
DOI： 10.1063/1.5002763 　

ISSN： 0003-6951
Bridging atomistic magnetism and coercivity in Nd-Fe-B magnets Peer-reviewed

Hiroki Tsuchiura, Takuya Yoshioka, Pavel Novák

Scripta Materialia　2018
Publisher: Acta Materialia Inc
DOI： 10.1016/j.scriptamat.2018.04.023 　

ISSN： 1359-6462
Superconductivity in the underdoped region of the T’-structure cuprates based on an effective two-band model Peer-reviewed

Yamazaki, H Tsuchiura, T Yoshioka, M Ogata

Journal of Physics: Conference Series　969　(1)　012044　2018

DOI： 10.1088/1742-6596/969/1/012044 　

ISSN： 1742-6588

eISSN： 1742-6596
Anomalous dispersion relations in the staggered flux state Peer-reviewed

H Tsuchiura, M Ogata, K Yamazaki, R Asaoka

Journal of Physics: Conference Series　969　(1)　012066　2018
Study on using materials for a purple glass bottle manufactured at edo-era Peer-reviewed

Fumiyoshi Kirino, Kazushi Yokoyama, Mai Saigan, Miki Igari, Hiroki Tsuchiura

Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals　82　(2)　44-51　2018
Publisher: Japan Institute of Metals (JIM)
DOI： 10.2320/jinstmet.J2017033 　

ISSN： 0021-4876
Spin-current induced around half-quantum vortices in chiral p-wave superconducting states Peer-reviewed

R. Asaoka, H. Tsuchiura, M. Sigrist

Journal of Physics: Conference Series　871　(1)　012025　2017/07/26
Publisher: Institute of Physics Publishing
DOI： 10.1088/1742-6596/871/1/012025 　

ISSN： 1742-6596 1742-6588
An effective Hamiltonian and its phase diagram for T'-structure cuprates Peer-reviewed

Kunito Yamazaki, Takuya Yoshioka, Hiroki Tsuchiura, Masao Ogata

Journal of Physics: Conference Series　871　(1)　012009　2017/07/26
Publisher: Institute of Physics Publishing
DOI： 10.1088/1742-6596/871/1/012009 　

ISSN： 1742-6596 1742-6588
Magnetic Anisotropy Around Grain-Boundaries in Rare-Earth Magnets and Their Coercivity Invited Peer-reviewed

Takuya Yoshioka, Hiroki Tsuchiura

JOURNAL OF THE JAPAN INSTITUTE OF METALS　81　(1)　19-25　2017

DOI： 10.2320/jinstmet.JA201604 　

ISSN： 0021-4876

eISSN： 1880-6880
Perpendicular magnetic tunnel junction with a strained Mn-based nanolayer Peer-reviewed

K. Z. Suzuki, R. Ranjbar, J. Okabayashi, Y. Miura, A. Sugihara, H. Tsuchiura, S. Mizukami

SCIENTIFIC REPORTS　6　2016/07

DOI： 10.1038/srep30249 　

ISSN： 2045-2322
19pBC-4 Local Magnetic Anisotropy in R_2Fe_<14>B

Yoshioka Takuya, Yamazaki Kunito, Tsuchiura Hiroki, Asaoka Rui, Kikuchi Yuhei, Miura Naoko, Kikuchi Shinji

Meeting Abstracts of the Physical Society of Japan　71　1117-1117　2016
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/jpsgaiyo.71.1.0_1117 　

ISSN： 2189-079X
Microscopic Analysis of Coercivity in Boundary Model of Nd-Fe-B

Yoshioka Takuya, Yamazaki Kunito, Suzuki Yuka, Tsuchiura Hiroki

Meeting Abstracts of the Physical Society of Japan　71　859-859　2016
Publisher: The Physical Society of Japan
DOI： 10.11316/jpsgaiyo.71.2.0_859 　
Superconducting states in an effective model for electron-doped cuprates

Yamazaki Kunito, Tuchiura Hiroki, Yoshioka Takuya, Ogata Masao

Meeting Abstracts of the Physical Society of Japan　71　1883-1883　2016
Publisher: The Physical Society of Japan
DOI： 10.11316/jpsgaiyo.71.2.0_1883 　
Dynamical instability in the S=1 Bose-Hubbard model Peer-reviewed

Rui Asaoka, Hiroki Tsuchiura, Makoto Yamashita, Yuta Toga

PHYSICAL REVIEW A　93　(1)　013628-013628　2016/01

DOI： 10.1103/PhysRevA.93.013628 　

ISSN： 2469-9926

eISSN： 2469-9934
Real-space presentation of the magnetic anisotropy of metallic ferromagnets Peer-reviewed

Jun-ichiro Inoue, Takuya Yoshioka, Hiroki Tsuchiura

JOURNAL OF APPLIED PHYSICS　117　(17)　17C720　2015/05

DOI： 10.1063/1.4913898 　

ISSN： 0021-8979

eISSN： 1089-7550
Crystal field parameters with Wannier functions: application to Nd2Fe14B systems Peer-reviewed

T. Yoshioka, H. Tsuchiura, P. Novak

MATERIALS RESEARCH INNOVATIONS　19　S34-S38　2015/05

DOI： 10.1179/1432891715Z.0000000001416 　

ISSN： 1432-8917

eISSN： 1433-075X
18pCH-8 First-principles estimation of electron structures and crystal field parameters in rare-earth iron compounds

Yoshioka Takuya, Asaoka Rui, Kikuchi Yuhei, Miura Naoko, Kikuchi Shinji, Yamazaki Kunito, Tsuchiura Hiroki

Meeting Abstracts of the Physical Society of Japan　70　949-949　2015
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/jpsgaiyo.70.2.0_949 　

ISSN： 2189-079X
22aPS-21 Half-quantum vortices in chiral p-wave superconductivity and spin-orbit coupling

Kikuchi Shinji, Kikuchi Yuhei, Yoshioka Takuya, Tsuchiura Hiroki, Sigrist Manfred

Meeting Abstracts of the Physical Society of Japan　70　2116-2116　2015
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/jpsgaiyo.70.1.0_2116 　

ISSN： 2189-079X
21pPSA-39 Crystal Field Hamiltonian with Wannier basis in R_2Fe_<14>B systems

Yoshioka Takuya, Asaoka Rui, Kikuchi Yuhei, Miura Naoko, Kikuchi Shinji, Tsuchiura Hiroki

Meeting Abstracts of the Physical Society of Japan　70　1111-1111　2015
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/jpsgaiyo.70.1.0_1111 　

ISSN： 2189-079X
21pAG-7 Magnetic instability of spin current in the S=1 Bose-Hubbard model

Asaoka R., Toga Y., Tsuchiura H., Yamashita M.

Meeting Abstracts of the Physical Society of Japan　70　611-611　2015
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/jpsgaiyo.70.1.0_611 　

ISSN： 2189-079X
Quasiparticle states around a half-quantum vortex in a chiral p-wave superconducting state Peer-reviewed

S. Kikuchi, Y. Kikuchi, T. Yoshioka, H. Tsuchiura, M. Sigrist

Proceedings of the 27th International Symposium on Superconductivity (ISS 2014)　65　93-96　2015

DOI： 10.1016/j.phpro.2015.05.137 　

ISSN： 1875-3892
Density Modulations Associated with the Dynamical Instability in the Bose-Hubbard Model Peer-reviewed

Rui Asaoka, Hiroki Tsuchiura, Makoto Yamashita, Yuta Toga

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　83　(12)　2014/12

DOI： 10.7566/JPSJ.83.124001 　

ISSN： 0031-9015
First-Principles Calculations of Crystal Field Parameters of Nd Ions Near Surfaces and Interfaces in Nd-Fe-B Magnets Invited Peer-reviewed

Hiroki Tsuchiura, Takuya Yoshioka, Pavel Novak

IEEE TRANSACTIONS ON MAGNETICS　50　(11)　2014/11

DOI： 10.1109/TMAG.2014.2329294 　

ISSN： 0018-9464

eISSN： 1941-0069
Magnetocrystalline anisotropy of the Fe-sublattice in Y2Fe14B systems Peer-reviewed

Yoshio Miura, Hiroki Tsuchiura, Takuya Yoshioka

JOURNAL OF APPLIED PHYSICS　115　(17)　17A765　2014/05

DOI： 10.1063/1.4869061 　

ISSN： 0021-8979

eISSN： 1089-7550
Combinatrial study for Mg-Si thin films fabricated by RF co-sputtering with Mg and Si targets Peer-reviewed

Y. Morita, Y. Hayashi, H. Tsuchiura, M. Nishitani

Materials Research Society Symposium Proceedings　1642　(January)　66-71　2014
Publisher: Materials Research Society
DOI： 10.1557/opl.2014.544 　

ISSN： 0272-9172
Tetragonal D0

Mizukami Shigemi, Sakuma Akimasa, Sugihara Atsushi, Kubota Takahide, Kondo Yukio, Tsuchiura Hiroki, Miyazaki Terunobu

Applied Physics Express　6　(12)　123002-123002-4　2013/12/25
Publisher: The Japan Society of Applied Physics
DOI： 10.7567/APEX.6.123002 　

ISSN： 1882-0778

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First-principles calculation of D0<inf>22</inf>Mn<inf>3</inf>Ge shows a fully spin-polarized \Delta_{1} band at the Fermi level, low saturation magnetization M_{\text{S } }=180 emu/cm³, high uniaxial magnetic anisotropy K_{\text{u } }=23 Merg/cm³, and low Gilbert damping \alpha=9\times 10^{-4}. We also experimentally investigate D0<inf>22</inf>Mn<inf>3+x</inf>Ge epitaxial films grown on MgO(100) substrates with different compositions x. The films exhibit a coercivity of about 20 kOe, M_{\text{S } } of about 130 emu/cm³, and K_{\text{u } } of about 10 Merg/cm³at x=0.55 (78 at.% Mn). These indicate that D0<inf>22</inf>Mn<inf>3</inf>Ge is a good candidate for spin-transfer-torque random access memory.
Tetragonal D0(22) Mn3+xGe Epitaxial Films Grown on MgO(100) with a Large Perpendicular Magnetic Anisotropy Peer-reviewed

Shigemi Mizukami, Akimasa Sakuma, Atsushi Sugihara, Takahide Kubota, Yukio Kondo, Hiroki Tsuchiura, Terunobu Miyazaki

APPLIED PHYSICS EXPRESS　6　(12)　123002　2013/12

DOI： 10.7567/APEX.6.123002 　

ISSN： 1882-0778

eISSN： 1882-0786
Crossover between BCS Superconductor and Doped Mott Insulator of d-Wave Pairing State in Two-Dimensional Hubbard Model Peer-reviewed

Hisatoshi Yokoyama, Masao Ogata, Yukio Tanaka, Kenji Kobayashi, Hiroki Tsuchiura

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　82　(1)　014707-1-014707-27　2013/01

DOI： 10.7566/JPSJ.82.014707 　

ISSN： 0031-9015
Influence of Surface Anisotropy on Orientation of Crystal Grain in Rare-Earth Permanent Magnet

C. Mitsumata, H. Tsuchiura, A. Sakuma

Proceedings of the 22nd International Workshop on Rare-Earth Permanent Magnets and Applications　130-133　2012/09/03
Magnetic Properties of Nd-Oxides in the Grain-Boundaries of Nd-Fe-B Magnets

A. Sakuma, H. Tsuchiura, C. Mitsumata

Proceedings of the 22nd International Workshop on Rare-Earth Permanent Magnets and Applications　135-138　2012/09/03
Mott Transition and Spin Structures of Spin-1 Bosons in Two-Dimensional Optical Lattice at Unit Filling Peer-reviewed

Yuta Toga, Hiroki Tsuchiura, Makoto Yamashita, Kensuke Inaba, Hisatoshi Yokoyama

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　81　(6)　063001　2012/06

DOI： 10.1143/JPSJ.81.063001 　

ISSN： 0031-9015
The characterization of electronic state from surface to several nanometer region on MgO:Si thin film Peer-reviewed

Mikihiko Nishitani, Mutsumu Fukada, Yukihiro Morita, Masaharu Terauchi, Tessei Kurashiki, Hiroki Tsuchiura, Yasushi Yamauchi

Materials Research Society Symposium Proceedings　1406　(1)　101-106　2012

DOI： 10.1557/opl.2012.29 　

ISSN： 0272-9172
Model Calculation of Magnetization Reversal Process of Hard Magnet in Nd2Fe14B System Peer-reviewed

Chiharu Mitsumata, Hiroki Tsuchiura, Akimasa Sakuma

APPLIED PHYSICS EXPRESS　4　(11)　113002　2011/11

DOI： 10.1143/APEX.4.113002 　

ISSN： 1882-0778
First principles study on the local magnetic anisotropy near surfaces of Dy2Fe14B and Nd2Fe14B magnets Peer-reviewed

Susumu Tanaka, Hiroshi Moriya, Hiroki Tsuchiura, Akimasa Sakuma, Martin Divis, Pavel Novak

JOURNAL OF APPLIED PHYSICS　109　(7)　07A702　2011/04

DOI： 10.1063/1.3553935 　

ISSN： 0021-8979

eISSN： 1089-7550
First-principles calculation of crystal field parameters of Dy ions substituted for Nd in Nd-Fe-B magnets Peer-reviewed

S. Tanaka, H. Moriya, H. Tsuchiura, A. Sakuma, M. Divis, P. Novak

2ND INTERNATIONAL SYMPOSIUM ON ADVANCED MAGNETIC MATERIALS AND APPLICATIONS (ISAMMA 2010)　266　012045　2011

DOI： 10.1088/1742-6596/266/1/012045 　

ISSN： 1742-6588
First principles study on interfacial electronic structures in exchange-spring magnets Peer-reviewed

Yuta Toga, Hiroshi Moriya, Hiroki Tsuchiura, Akimasa Sakuma

2ND INTERNATIONAL SYMPOSIUM ON ADVANCED MAGNETIC MATERIALS AND APPLICATIONS (ISAMMA 2010)　266　012046　2011

DOI： 10.1088/1742-6596/266/1/012046 　

ISSN： 1742-6588
Finite size effects on the quantum spin Hall state Peer-reviewed

Yuichi Ohyama, Hiroki Tsuchiura, Akimasa Sakuma

2ND INTERNATIONAL SYMPOSIUM ON ADVANCED MAGNETIC MATERIALS AND APPLICATIONS (ISAMMA 2010)　266　012103　2011

DOI： 10.1088/1742-6596/266/1/012103 　

ISSN： 1742-6588
First principles study for the electronic structure and residual resistivity of Co(2)MnZ (Z= Al, Si) Peer-reviewed

Yohei Kota, Hiroki Tsuchiura, Akimasa Sakuma

INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009)　200　052012　2010

DOI： 10.1088/1742-6596/200/5/052012 　

ISSN： 1742-6588
Theoretical study on the stability of magnetic structures in the surface and interfaces of Heusler alloys, Co2MnAl and Co2MnSi Peer-reviewed

A. Sakuma, Y. Toga, H. Tsuchiura

JOURNAL OF APPLIED PHYSICS　105　(7)　07C910　2009/04

DOI： 10.1063/1.3058622 　

ISSN： 0021-8979

eISSN： 1089-7550
Spin-polarized electronic structures and transport properties of Fe-Co alloys Peer-reviewed

Yohei Kota, Tomohiro Takahashi, Hiroki Tsuchiura, Akimasa Sakuma

JOURNAL OF APPLIED PHYSICS　105　(7)　07B716　2009/04

DOI： 10.1063/1.3073955 　

ISSN： 0021-8979
First principles calculation of crystal field parameter near surfaces of Nd2Fe14B Peer-reviewed

Hiroshi Moriya, Hiroki Tsuchiura, Akimasa Sakuma

JOURNAL OF APPLIED PHYSICS　105　(7)　07A740　2009/04

DOI： 10.1063/1.3073931 　

ISSN： 0021-8979
Anti-phase superconducting domain structures in the t-t '-t ''-J model Peer-reviewed

H. Tsuchiura, M. Ogata

25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PT 5A　150　(5a)　052272　2009

DOI： 10.1088/1742-6596/150/5/052272 　

ISSN： 1742-6588
Ab-Initio Study on the Magnetic Structures in the Ordered Mn3Pt Alloy Peer-reviewed

Yohei Kota, Hiroki Tsuchiura, Akimasa Sakuma

IEEE TRANSACTIONS ON MAGNETICS　44　(11)　3131-3133　2008/11

DOI： 10.1109/TMAG.2008.2001678 　

ISSN： 0018-9464
Inpurity-induced states in inhomogeneous superconductivity in high-T(c) cuprates Peer-reviewed

H. Tsuchiura, A. Sakuma, K. Takaki

INTERNATIONAL SYMPOSIUM ON LATTICE EFFECTS IN CUPRATE HIGH TEMPERATURE SUPERCONDUCTORS (LEHTSC2007)　108　2008

DOI： 10.1088/1742-6596/108/1/012035 　

ISSN： 1742-6588
Impurity-induced states in inhomogeneous superconductivity in high-Tc cuprates Peer-reviewed

H. Tsuchiura, A. Sakuma, K. Takaki

Journal of Physics: Conference Series　108　012035　2008

DOI： 10.1088/1742-6596/108/1/012035 　
Decoherence processes of a quantum two-level system coupled to a fermionic environment Peer-reviewed

Naoyoshi Yamada, Akimasa Sakuma, Hiroki Tsuchiura

JOURNAL OF APPLIED PHYSICS　101　(9)　09C110　2007/05

DOI： 10.1063/1.2712944 　

ISSN： 0021-8979

eISSN： 1089-7550
Inhomogeneous electronic states due to out-of-plane disorder in the t-t '-J model Peer-reviewed

Hiroki Tsuchiura, Kenichi Takaki, Satoshi Kashiwaya, Akimasa Sakuma

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　310　(2)　514-516　2007/03

DOI： 10.1016/j.jmmm.2006.10.516 　

ISSN： 0304-8853
Enhancement of electronic inhomogeneities due to out-of-plane disorder in Bi2Sr2CuO6+delta superconductors observed by scanning tunneling spectroscopy Peer-reviewed

A. Sugimoto, S. Kashiwaya, H. Eisaki, H. Kashiwaya, H. Tsuchiura, Y. Tanaka, K. Fujita, S. Uchida

PHYSICAL REVIEW B　74　(9)　094503　2006/09

DOI： 10.1103/PhysRevB.74.094503 　

ISSN： 1098-0121
Influences of energy dependent quasiparticle lifetime effect on tunneling spectra of high-T-c superconductors Peer-reviewed

Satoshi Kashiwaya, Akira Sugimoto, Hiromi Kashiwaya, Tetsuro Matsumoto, Hiroshi Eisaki, Masao Koyanagi, Hiroki Tsuchiura, Yukio Tanaka

LOW TEMPERATURE PHYSICS, PTS A AND B　850　523-+　2006

ISSN： 0094-243X
Electronic inhomogeneity as a function of out-of-plane disorder in Ln-doped Bi2201 superconductors Peer-reviewed

A. Sugimoto, S. Kashiwaya, H. Eisaki, H. Kashiwaya, H. Tsuchiura, Y. Tanaka, K. Fujita, S. Uchida

LOW TEMPERATURE PHYSICS, PTS A AND B　850　507-+　2006

ISSN： 0094-243X
Tunneling spectra of high-T-c superconductors with d density wave order Peer-reviewed

Y Asano, Y Tanaka, H Tsuchiura, S Kashiwaya

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS　67　(1-3)　186-188　2006/01

DOI： 10.1016/j.jpcs.2005.10.100 　

ISSN： 0022-3697

eISSN： 1879-2553
Kinetic-energy pairing and condensation energy in cuprates Invited Peer-reviewed

M Ogata, H Yokoyama, Y Yanase, Y Tanaka, H Tsuchiura

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS　67　(1-3)　37-40　2006/01

DOI： 10.1016/j.jpcs.2005.10.017 　

ISSN： 0022-3697
Correlation between modulation structure and electronic inhomogeneity on Pb-doped Bi-2212 single crystals Peer-reviewed

A Sugimoto, S Kashiwaya, H Eisaki, H Yamaguchi, K Oka, H Kashiwaya, H Tsuchiura, Y Tanaka

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　426　390-395　2005/10

DOI： 10.1016/j.physc.2005.01.036 　

ISSN： 0921-4534
STM/STS observations of Pb-doped Bi-2212 single crystals Peer-reviewed

A Sugimoto, S Kashiwaya, H Eisaki, K Oka, H Tuchiura, Y Tanaka

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　412　270-274　2004/10

DOI： 10.1016/j.physc.2004.01.050 　

ISSN： 0921-4534
Zero-bias peak in tunneling superconductors and spectra of high-T-c its splitting Peer-reviewed

Y Asano, R Sekiguchi, Y Tanaka, H Tsuchiura, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　412　157-161　2004/10

DOI： 10.1016/j.physc.2004.01.039 　

ISSN： 0921-4534
Josephson effect in quasi one-dimensional superconductors (TMTSF)(2)X Peer-reviewed

Y Asano, Y Tanuma, Y Tanaka, K Kuroki, H Tsuchiura, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　412　212-216　2004/10

DOI： 10.1016/j.physc.2003.12.032 　

ISSN： 0921-4534
Mesoscopic fluctuations of Josephson current in high-T-c superconductor junctions Peer-reviewed

K Sakamoto, Y Asano, Y Tanaka, H Tsuchiura, J Inoue, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　412　221-224　2004/10

DOI： 10.1016/j.physc.2003.12.069 　

ISSN： 0921-4534
Conductance in normal-metal/PrOs4Sb12 Peer-reviewed

Y Asano, Y Tanaka, Y Matsuda, H Tsuchiura, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　412　235-239　2004/10

DOI： 10.1016/j.physc.2004.01.049 　

ISSN： 0921-4534

eISSN： 1873-2143
Magnetic field tunneling spectroscopy of YBa2Cu3O7-delta/La0.67Sr0.33MnO3 junctions Peer-reviewed

H Kashiwaya, S Kashiwaya, B Prijamboedi, K Ikeda, Kurosawa, I, H Tsuchiura, Y Tanaka

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　412　275-278　2004/10

DOI： 10.1016/j.physc.2004.01.051 　

ISSN： 0921-4534
Josephson effect in quasi one-dimensional unconventional superconductors Peer-reviewed

Y Asano, Y Tanaka, Y Tanuma, K Kuroki, H Tsuchiura

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　73　(7)　1922-1930　2004/07

DOI： 10.1143/JPSJ.73.1922 　

ISSN： 0031-9015
Theoretical study on magnetic phase diagram of metallic pyrochlore lattice in double exchange model Peer-reviewed

D Ikoma, H Tsuchiura, J Inoue

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　272　515-516　2004/05

DOI： 10.1016/j.jmmm.2003.12.1023 　

ISSN： 0304-8853
Crossover of superconducting properties and kinetic-energy gain in two-dimensional Hubbard model Peer-reviewed

H Yokoyama, Y Tanaka, M Ogata, H Tsuchiura

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　73　(5)　1119-1122　2004/05

DOI： 10.1143/JPSJ.1119 　

ISSN： 0031-9015
Josephson effect in organic superconductors (TMTSF)2X Peer-reviewed

Y. Asano, Y. Tanaka, K. Kuroki, Y. Tanuma, H. Tsuchiura, S. Kashiwaya

Journal of the Physical Society of Japan　73　(7)　1922-1930　2004
H. Yokoyama, Y. Tanaka, M. Ogata and H. Tsuchiura Peer-reviewed

H. Yokoyama, Y. Tanaka, M. Ogata, H. Tsuchiura

Journal of Physical Society of Japan　70　(5)　1119-1122　2004
Magnetic Field Tunneling Spectroscopy of YBaCuO/LaSrMnO Junction Peer-reviewed

H. Kashiwaya, K. Ikeda, B. Projamboedi, S. Kashiwaya, I. Kurosawa, H. Tsuchiura, Y. Tanaka

Physica C　412-414　275-278　2004
Quasiparticle states around vortex cores in the t-J model Peer-reviewed

T Kuribayashi, H Tsuchiura, Y Tanaka, J Inoue, M Ogata, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　392　419-423　2003/10

DOI： 10.1016/S0921-4534(03)01043-8 　

ISSN： 0921-4534
Josephson effect in d-wave superconductor junctions in a lattice model Peer-reviewed

S Shirai, H Tsuchiura, Y Asano, Y Tanaka, J Inoue, Y Tanuma, S Kashiwaya

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　72　(9)　2299-2307　2003/09

DOI： 10.1143/JPSJ.72.2299 　

ISSN： 0031-9015
Magnetic phase diagram of metallic pyrochlore lattice in the double-exchange model Peer-reviewed

D Ikoma, H Tsuchiura, J Inoue

PHYSICAL REVIEW B　68　(1)　014420　2003/07

DOI： 10.1103/PhysRevB.68.014420 　

ISSN： 2469-9950

eISSN： 2469-9969
Electronic states around a vortex core in high-T-c superconductors based on the t-J model Peer-reviewed

H Tsuchiura, M Ogata, Y Tanaka, S Kashiwaya

PHYSICAL REVIEW B　68　(1)　012509　2003/07

DOI： 10.1103/PhysRevB.68.012509 　

ISSN： 2469-9950

eISSN： 2469-9969
Local magnetic moments in vortex cores and around nonmagnetic impurities in two-dimensional t-J model Peer-reviewed

M Ogata, H Tsuchiura, Y Tanaka, S Kashiwaya

PHYSICA B-CONDENSED MATTER　329　1453-1454　2003/05

DOI： 10.1016/S0921-4526(02)02376-1 　

ISSN： 0921-4526
Electronic states around vortex cores in the t-J model Invited Peer-reviewed

H Tsuchiura, M Ogata, Y Tanaka, S Kashiwaya

JOURNAL OF LOW TEMPERATURE PHYSICS　131　(3-4)　209-216　2003/05

DOI： 10.1023/A:1022912700075 　

ISSN： 0022-2291
Temperature dependence of the Josephson current in the d-wave superconductor junction based on the 2-D extended Hubbard model Peer-reviewed

S Shirai, H Tsuchiura, Y Tanaka, J Inoue, S Kashiwaya

JOURNAL OF LOW TEMPERATURE PHYSICS　131　(3-4)　503-507　2003/05

DOI： 10.1023/A:1022951203226 　

ISSN： 0022-2291
Electronic states around a vortex core in high-Tc superconductors based on the t-J model Peer-reviewed

Hiroki Tsuchiura, Masao Ogata, Yukio Tanaka, Satoshi Kashiwaya

Physical Review B - Condensed Matter and Materials Physics　68　(1)　2003

DOI： 10.1103/PhysRevB.68.012509 　

ISSN： 1550-235X 1098-0121
Magnetic phase diagram of metallic pyrochlore lattice in the double-exchange model Peer-reviewed

Daisaku Ikoma, Hiroki Tsuchiura, Jun-Ichiro Inoue, Hiroki Tsuchiura

Physical Review B - Condensed Matter and Materials Physics　68　(1)　2003

DOI： 10.1103/PhysRevB.68.014420 　

ISSN： 1550-235X 1098-0121
Temperature dependence of Josephson current in d-wave superconductor Peer-reviewed

S Shirai, H Tsuchiura, Y Tanaka, J Inoue, S Kashiwaya

TOWARDS THE CONTROLLABLE QUANTUM STATES: MESOSCOPIC SUPERCONDUCTIVITY AND SPINTRONICS　223-228　2003
Journal of Physical Society of Japan Peer-reviewed

S. Shirai, H. Tsuchiura, Y. Asano, Y. Tanaka, J. Inoue, Y. Tanuma, S. Kashiwaya

Journal of Physical Society of Japan　72　(9)　2299-2307　2003
Temperature dependence of the Josephson current in a d-wave superconductor junction using the 2-d extended Hubbard model Peer-reviewed

S. Shirai, H. Tsuchiura, Y. Tanaka, J. Inoue, S. Kashiwaya

Journal of Low temperature Physics　131　503-507　2003
Mesoscopic effect observed in strong correlated electron materials Peer-reviewed

H Kashiwaya, A Sawa, S Kashiwaya, Kurosawa, I, H Tsuchiura, Y Tanaka

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　378　364-367　2002/10

DOI： 10.1016/S0921-4534(02)01446-6 　

ISSN： 0921-4534
Tunneling conductance in normal metal-high-T-C cuprate junctions in the presence of magnetic field Peer-reviewed

Y Tanaka, H Itoh, Y Tanuma, H Tsuchiura, J Inoue, S Kashiwaya

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　71　(8)　2005-2009　2002/08

DOI： 10.1143/JPSJ.71.2005 　

ISSN： 0031-9015
Vortex tunneling spectra of high-T-c superconductors based on the t-J model Peer-reviewed

H Tsuchiura, S Uno, Y Tanaka, M Ogata, JI Inoue, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　367　(1-4)　20-23　2002/02

DOI： 10.1016/S0921-4534(01)00980-7 　

ISSN： 0921-4534
Quasiparticle bound states near the interface of high-T-c superconductors Peer-reviewed

Y Tanaka, H Itoh, H Tsuchiura, Y Tanuma, J Inoue, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　367　(1-4)　73-78　2002/02

DOI： 10.1016/S0921-4534(01)00995-9 　

ISSN： 0921-4534

eISSN： 1873-2143
Tight-binding formulation of the electrical transport in mesoscopic system with unconventional superconductors Peer-reviewed

H Itoh, Y Tanaka, H Tsuchiura, J Inoue, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　367　(1-4)　133-136　2002/02

DOI： 10.1016/S0921-4534(01)00990-X 　

ISSN： 0921-4534
Local density of states near the surface of high-T-c superconductors under magnetic field based on the t-J model Peer-reviewed

Y Tanuma, Y Tanaka, H Tsuchiura, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　367　(1-4)　147-151　2002/02

DOI： 10.1016/S0921-4534(01)00997-2 　

ISSN： 0921-4534
Theory of the spin-dependent transport in superconducting quantum point contacts with a ferromagnetic metal Peer-reviewed

N Yoshida, H Itoh, H Tsuchiura, Y Tanaka, J Inoue, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　367　(1-4)　185-190　2002/02

DOI： 10.1016/S0921-4534(01)01010-3 　

ISSN： 0921-4534
Temperature dependence of Josephson current on d-wave Josephson junctions Peer-reviewed

S. Shirai, H. Tsuchiura, Y. Tanaka, J. Inoue, S. Kashiwaya

Toward The Controllable Quantum States　223-228　2002
Influence of magnetic field on tunneling conductance in normal metal/dx2-y2-wave superconductor junctions Peer-reviewed

Y Tanaka, H Tsuchiura, Y Tanuma, S Kashiwaya

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　71　(1)　271-277　2002/01

ISSN： 0031-9015
Effects of interface roughness on d-wave Josephson junctions Peer-reviewed

S Shirai, H Tsuchiura, Y Tanaka, J Inoue, S Kashiwaya

PHYSICA C　357　1584-1587　2001/08

DOI： 10.1016/S0921-4534(01)00557-3 　

ISSN： 0921-4534
Local magnetic moments around a nonmagnetic impurity in the two-dimensional t-J model Peer-reviewed

Hiroki TSUCHIURA, Yukio TANAKA, Masao OGATA, Satoshi KASHIWAYA

Physical Review B　64　140501(R)　2001/07
Lattice model calculations for d(x2-y2)-wave Josephson junctions Peer-reviewed

H Tsuchiura, Y Tanaka, M Ogata, S Kashiwaya

PHYSICA C　352　(1-4)　165-168　2001/04

DOI： 10.1016/S0921-4534(00)01716-0 　

ISSN： 0921-4534
Local magnetic moments around a nonmagnetic impurity in the two-dimensional (formula presented) model Peer-reviewed

Hiroki Tsuchiura, Yukio Tanaka, Masao Ogata, Satoshi Kashiwaya

Physical Review B - Condensed Matter and Materials Physics　64　(14)　2001

DOI： 10.1103/PhysRevB.64.140501 　

ISSN： 1550-235X 1098-0121
Magnetic impurities in t-J model Peer-reviewed

H Tsuchiura, Y Tanaka, M Ogata, S Kashiwaya

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS　62　(1-2)　265-267　2001/01

DOI： 10.1016/S0022-3697(00)00142-6 　

ISSN： 0022-3697
The resonance states around an impurity in d(x2-y2)-wave superconductors Peer-reviewed

H Tsuchiura, Y Tanaka, M Ogata, S Kashiwaya

PHYSICA B　284　427-428　2000/07

ISSN： 0921-4526
Local density of states around a magnetic impurity in high-T-c superconductors based on the t-J model Peer-reviewed

H Tsuchiura, Y Tanaka, M Ogata, S Kashiwaya

PHYSICAL REVIEW LETTERS　84　(14)　3165-3168　2000/04

DOI： 10.1103/PhysRevLett.84.3165 　

ISSN： 0031-9007
Impurities and vortex cores in the t-J model Peer-reviewed

M Ogata, A Himeda, H Tsuchiura, Y Tanaka, S Kashiwaya

ADVANCES IN SUPERCONDUCTIVITY XII　XII　62-67　2000
Intrinsic Josephson effect in the layered two-dimensional t-J model Peer-reviewed

N Kawai, H Tsuchiura, Y Tanaka, J Inoue

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　68　(10)　3166-3169　1999/10

DOI： 10.1143/JPSJ.68.3166 　

ISSN： 0031-9015
Study of the quasiparticle spectra near the surface or nonmagnetic impurities in high-T-c superconductors Peer-reviewed

H Tsuchiura, Y Tanuma, Y Tanaka, M Ogata, S Kashiwaya, J Inoue

SURFACE SCIENCE　438　(1-3)　347-352　1999/09

DOI： 10.1016/S0039-6028(99)00601-9 　

ISSN： 0039-6028
Quasiparticle properties around a nonmagnetic impurity in the superconducting state of the two-dimensional t-J model Peer-reviewed

H Tsuchiura, Y Tanaka, M Ogata, S Kashiwaya

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　68　(8)　2510-2513　1999/08

DOI： 10.1143/JPSJ.68.2510 　

ISSN： 0031-9015
Impurity effect in the superconducting state of the two-dimensional t-J model Peer-reviewed

H Tsuchiura, Y Tanaka, M Ogata, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　317　518-520　1999/05

ISSN： 0921-4534
Impurity effects on the superconducting state with a nodeless gap in the t-J model Peer-reviewed

H. Tsuchiura, Y. Tanaka, M. Ogata, S. Kashiwaya

Advances in Superconductivity　XI　331　1999
Superconducting states with a nodeless gap in the t-t'-J-J' model Peer-reviewed

H. Tsuchiura, Y. Tanaka, M. Ogata, S. Kashiwaya

Advances in Superconductivity　XI　347　1999
Enhancement of the extended s-wave pairing in the two-dimensional t-J model Peer-reviewed

H Tsuchiura, Y Tanaka, M Ogata, S Kashiwaya

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS　59　(10-12)　1867-1869　1998/10

DOI： 10.1016/S0022-3697(98)00127-9 　

ISSN： 0022-3697
Parallelization for STEM2 Code in Simulating Acid Rain

Hideyuki KITABATA, Hiroki TSUCHIURA, Hiromasa UEDA, Hiroshi AIKAWA

JAERI-Data/Code 98-015　1998/03
Paring symmetries in the two-dimensional t-t'-J-J(3) model Peer-reviewed

H. Tsuchiura, Y. Tanaka, M. Ogata, S. Kashiwaya

Advances in Superconductivity　X　253　1998
A model calculation for photo-stimulated desorption Peer-reviewed

H Tsuchiura, H Kasai, A Okiji

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　66　(9)　2805-2810　1997/09

DOI： 10.1143/JPSJ.66.2805 　

ISSN： 0031-9015
Effects of electronic excitations on potential energy surfaces: Simple model calculations Peer-reviewed

H Tsuchiura, H Kasai, A Okiji

SURFACE SCIENCE　363　(1-3)　274-280　1996/08

DOI： 10.1016/0039-6028(96)80100-2 　

ISSN： 0039-6028
A microscopic theory of desorption induced by electronic transitions Invited Peer-reviewed

H Kasai, A Okiji, H Tsuchiura

SURFACE SCIENCE　363　(1-3)　214-222　1996/08

DOI： 10.1016/0039-6028(96)00139-2 　

ISSN： 0039-6028
Energy spectrum of quasiparticles for various pairing states in 2-D extended Hubbard model Peer-reviewed

Y Ushuijima, Y Tanaka, H Tsuchiura

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS　56　(12)　1767-1768　1995/12

DOI： 10.1016/0022-3697(95)00190-5 　

ISSN： 0022-3697
STABILITY OF S+ID-WAVE PAIRING STATE IN THE 2-D EXTENDED HUBBARD-MODEL Peer-reviewed

H TSUCHIURA, Y TANAKA, Y USHIJIMA

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　64　(3)　922-926　1995/03

DOI： 10.1143/JPSJ.64.922 　

ISSN： 0031-9015

Show all ︎Show first 5

Misc. 79

『銅酸化物の有効モデルに対する揺らぎ交換近似』コードのSX-ACE 向け最適化

山下毅, 山崎国人, 江川隆輔, 吉岡匠哉, 土浦宏紀, 小林広明, 曽根秀昭

SENAC : 東北大学大型計算機センター広報　50　(1)　25-30　2017/01
Publisher: 東北大学サイバーサイエンスセンター
ISSN： 0286-7419
9aPS-1 Stability analysis of half-quantum vortex in topological superconductivity

Kikuchi Shinji, Kikuchi Yuhei, Yoshioka Takuya, Tsuchiura Hiroki

Meeting abstracts of the Physical Society of Japan　69　(2)　571-571　2014/08/22
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
7pBC-6 First-principles analyses of structures and magnetic anisotropy energy of interfaces between Nd_2Fe_<14>B main phases and Nd oxides

Misawa H., Gohda Y., Tsuchiura H., Tsuneyuki S.

Meeting abstracts of the Physical Society of Japan　69　(2)　268-268　2014/08/22
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
7aPS-106 First Principles Estimation of Crystal Field Parameters for Nd_2Fe_<14>B

Yoshioka Takuya, Asaoka Rui, Kikuchi Yuhei, Miura Naoko, Kikuchi Shinji, Tsuchiura Hiroki

Meeting abstracts of the Physical Society of Japan　69　(2)　256-256　2014/08/22
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aPS-45 A first-principles study on magnetocrystalline anisotropy of Y_2Fe_<14>B

Miura Y., Yoshioka T., Tsuchiura H.

Meeting abstracts of the Physical Society of Japan　69　(1)　485-485　2014/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
30aPS-22 Loop Currents of the Bose-Hubbard model with Staggered Flux

Toga Y., Tsuchiura H., Yokoyama H.

Meeting abstracts of the Physical Society of Japan　69　(1)　365-365　2014/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
30aAY-9 First-principles studies of interfaces between Nd_2Fe_<14>B grains and grain boundaries in Nd-Fe-B sintered magnets

Misawa H., Gohda Y., Tsuchiura H., Tsuneyuki S.

Meeting abstracts of the Physical Society of Japan　69　(1)　906-906　2014/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Effective spin model for n=2 Mott lobe in the S=1 Bose-Hubbard model

Toga Y., Tsuchiura H., Yamashita M., Yokoyama H.

Meeting abstracts of the Physical Society of Japan　68　(2)　131-131　2013/08/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Staggered flux state of bosons in an optical lattice

Toga Y., Tsuchiura H., Yokoyama H.

Meeting abstracts of the Physical Society of Japan　68　(2)　509-509　2013/08/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Dependence of particle number density in dynamical instability of the BEC with internal degrees of freedom

ASAOKA Rui, TOGA Yuta, TSUCHIURA Hiroki, YAMASHITA Makoto

Meeting abstracts of the Physical Society of Japan　68　(2)　143-143　2013/08/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Electronic Structure and Pairing Symmetry of LiFeAs

Kikuchi Y., Tsuchiura H.

Meeting abstracts of the Physical Society of Japan　68　(2)　582-582　2013/08/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
26pPSA-40 First-principles studies of interfaces between Nd_2Fe_<14>B grains and grain boundaries in Nd_2Fe_<14>B sintered magnets

Misawa H., Gohda Y., Tsuchiura H., Tsuneyuki S.

Meeting abstracts of the Physical Society of Japan　68　(1)　979-979　2013/03/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28pEE-1 Spin-Nematic states of strongly correlated spin-1 bosons in the magnetic field

Toga Y., Tsuchiura H., Yamashita M., Yokoyama H.

Meeting abstracts of the Physical Society of Japan　68　(1)　232-232　2013/03/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pPSA-25 Stability analysis of the ferromagnetic spinor BEC

Tsuchida Kentaro, Tsuchiura Hiroki, Yamashita Makoto, Asaoka Rui, Toga Yuta

Meeting abstracts of the Physical Society of Japan　68　(1)　373-373　2013/03/26
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
20pPSB-5 The vortex core-induced bound state in multi-band superconductivity

Kikuchi Y., Tsuchiura H.

Meeting abstracts of the Physical Society of Japan　67　(2)　558-558　2012/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
19aAL-7 Dynamical instability of the BEC having internal degrees of freedom

ASAOKA Rui, TOGA Yuta, TSUCHIURA Hiroki, YAMASHITA Makoto

Meeting abstracts of the Physical Society of Japan　67　(2)　143-143　2012/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
19aAL-6 Collapse and revival of the matter wave of spin-1 bosons trapped in an optical lattice

Yamashita M., Inaba K., Tsuchiura H.

Meeting abstracts of the Physical Society of Japan　67　(2)　143-143　2012/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aPS-127 The spatial distribution of spin current around the half quantum vortices

Ohyama Y., Tsuchiura H., Kashiwaya S.

Meeting abstracts of the Physical Society of Japan　67　(1)　622-622　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aYD-10 Quasi-particle states in the vortex core of iron-based superconductors

Kikuchi Y., Tsuchiura H.

Meeting abstracts of the Physical Society of Japan　67　(1)　688-688　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aBE-1 Instability and decay dynamics of S=1 superfluid current in an optical lattice

ASAOKA Rui, TOGA Yuta, TSUCHIURA Hiroki, YAMASHITA Makoto

Meeting abstracts of the Physical Society of Japan　67　(1)　201-201　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aBE-2 Spin structures of spin-1 bosons in an optical lattice at non-integer filling

Toga Y., Tsuchiura H., Yamashita M, Yokoyama H.

Meeting abstracts of the Physical Society of Japan　67　(1)　201-201　2012/03/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Coercivity Mechanism of Nd-Fe-B Magnets: Theoretical approach based on First-principles calculations and micromagnetic simulation

Hiroki Tsuchiura, Chiharu Mitsumata, Akimasa Sakuma

Materia Japan　50　(9)　383-388　2011/09
Publisher: The Japan institute of Metals
DOI： 10.2320/materia.50.383 　

ISSN： 1340-2625
22pPSA-6 Quasi-particle states in the vortex core of iron-based superconductors

Kikuchi Y., Tsuchiura H.

Meeting abstracts of the Physical Society of Japan　66　(2)　556-556　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
22aPS-12 The spatial distribution of spin current around the half quantum vortices

Ohyama Y., Tsuchiura H., Kashiwaya S.

Meeting abstracts of the Physical Society of Japan　66　(2)　512-512　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
22pPSA-69 Dynamical instability of BEC in the S=1 Bose-Hubbard model

Asaoka Rui, Toga Yuta, Tsuchiura Hiroki, Yamashita Makoto

Meeting abstracts of the Physical Society of Japan　66　(2)　246-246　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
22aEA-2 Variational study on the quantum phase transition near the n=2 Mott lobe in the two-dimensional S=1 Bose-Hubbard model

Toga Y., Tsuchiura H., Yamashita M., Yokoyama H.

Meeting abstracts of the Physical Society of Japan　66　(2)　140-140　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25pRD-8 Variational study on the quantum phase transition near the n=2 Mott lobe in the two-dimensional S=1 Bose-Hubbard model

Toga Y., Tsuchiura H., Yamashita M., Yokoyama H.

Meeting abstracts of the Physical Society of Japan　66　(1)　184-184　2011/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
26pPSA-53 The spatial distribution of spin current around the half quantum vortices

Ohyama Y., Tsuchiura H., Kashiwaya S.

Meeting abstracts of the Physical Society of Japan　66　(1)　630-630　2011/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
26aRD-5 Variational study on Mott transition and spin correlations in the two-dimensional S=1 Bose-Hubbard model

Toga Y., Tsuchiura H., Yamashita M., Yokoyama H.

Meeting abstracts of the Physical Society of Japan　65　(2)　161-161　2010/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
23aPS-91 Microscopic theory of stability of half-quantum vortices in p_x+ip_y superconductors

Ohyama Y., Tsuchiura H., Kashiwaya S.

Meeting abstracts of the Physical Society of Japan　65　(2)　481-481　2010/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
21pPSB-7 Variational study on Mott transition in the S=1 two-dimensional Bose-Hubbard model

Toga Y., Tsuchiura H., Yamashita M., Yokoyama H., Sakuma A.

Meeting abstracts of the Physical Society of Japan　65　(1)　316-316　2010/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Crystalline Magnetic Anisotropy in Nd-Fe-B Magnets

Hiroki Tsuchiura, Yuta Toga, Hiroshi Moriya, Akimasa Sakuma

SOLID STATE PHYSICS　44　(10)　39-50　2009/10/15
Publisher: Agne Gijutsu Center
ISSN： 0454-4544
27pRL-11 Charge modulation and quasiparticle interference effects in disordered t-J type model

Tsuchiura Hiroki, Ogata Masao

Meeting abstracts of the Physical Society of Japan　64　(2)　553-553　2009/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28aTF-11 First-principles calculations for the electrical conductivities of transition metal alloys

Sakuma A., Kota Y., Tsuchiura H.

Meeting abstracts of the Physical Society of Japan　64　(1)　472-472　2009/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
A Beginner's Guide to the WIEN2k Code

Hiroki Tsuchiura, Yuta Toga, Hiroshi Moriya, Akimasa Sakuma

Magnetics Japan　3　(12)　586-593　2008/12/01
Publisher: The Magnetic Society of Japan
ISSN： 1880-7208
24aRH-3 Electronic charge density waves with 4-lattice periodicity and magnetic ordering in the t-J model

Tsuchiura Hiroki, Ogata Masao

Meeting abstracts of the Physical Society of Japan　63　(1)　557-557　2008/02/29
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
18aPS-10 Electrical conductivity of TMR element in non collinear magnetic distribution

Takaki K., Tsuchiura H., Sakuma A.

Meeting abstracts of the Physical Society of Japan　62　(1)　404-404　2007/02/28
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
18aPS-30 Microscopic theory of the Gilbert damping (3)

Yamada N., Hasu K., Tsuchiura H., Sakuma A.

Meeting abstracts of the Physical Society of Japan　62　(1)　408-408　2007/02/28
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
18aPS-29 Effects of equilibrium and nonequilibrium spin currents on magnetization dynamics

Takahashi T., Tsuchiura H., Sakuma A.

Meeting abstracts of the Physical Society of Japan　62　(1)　408-408　2007/02/28
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
20aXE-9 Small peaks in the LDOS around vortex cores in cuprates

Tsuchiura Hiroki, Ogata Masao

Meeting abstracts of the Physical Society of Japan　62　(1)　617-617　2007/02/28
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aZG-11 Vortex core states in inhomogeneous superconductivity

Tsuchiura Hiroki, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　61　(2)　487-487　2006/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pUE-14 Inhomogeneous density of states caused by in- and out-of-plane disorder in cuprates

Tsuchiura Hiroki, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　61　(1)　564-564　2006/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
20pYJ-13 Electronic states around vortex cores of CeCoIn_5

Tsuchiura Hiroki, Ogata Masao, Tnaka Yukio

Meeting abstracts of the Physical Society of Japan　60　(2)　463-463　2005/08/19
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
26pWM-12 Effects of random-distribution of the t'-term on the superconducting state and vortex core states in the t-J model

Tsuchiura Hiroki, Sakuma Akimasa, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　60　(1)　590-590　2005/03/04
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Tunneling effect in triangular lattice superconductor NaxCoO2

Y Asano, Y Tanaka, K Kuroki, Y Tanuma, H Tsuchiura, S Kashiwaya

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS　412　(Pt.1)　187-191　2004/10

DOI： 10.1016/j.physc.2003.12.035 　

ISSN： 0921-4534
13pWB-8 An estimation of the spin accumulation in F/I/F junctions based on Green's function methods

Tsuchiura Hiroki, Sakuma Akimasa

Meeting abstracts of the Physical Society of Japan　59　(2)　390-390　2004/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28aPS-19 Electric Inhomogeneity in Pb-doped Bi-based Cuprate Superconductor by Cryogenic STM/STS.

Sugimoto A, Kashiwaya S, Eisaki H, Yamaguchi H, Tsuchiura H, Tanaka Y

Meeting abstracts of the Physical Society of Japan　59　(1)　560-560　2004/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aXA-5 Josephson effect in quasi one-dimensional superconductors (TMTSF)_2X

Asano Y., Tanaka Y., Tanuma Y., Kuroki K., Tsuchiura H.

Meeting abstracts of the Physical Society of Japan　59　(1)　509-509　2004/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Impurity-Induced Bound States in High-Tc Cuprates

Tsuchiura H, Ogata M, Tanaka Y, Kashiwaya S

BUTSURI　58　(4)　254-257　2003/04
Publisher: The Physical Society of Japan
DOI： 10.11316/butsuri1946.58.254 　

ISSN： 0029-0181

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Quasiparticle bound states can be formed around an impurity in high-T_e cuprates. Recently the property of the bound states has been increasingly understood because of the development in technology of scanning tunneling microscopy. Here we present the recent experimental and theoretical results about the bound states around a Zn impurity, which is the best understood among various impurity-induced bound states.
Theoretical study on vortex core states and impurity-induced states in cuprate superconductors

Tsuchiura Hiroki

Meeting abstracts of the Physical Society of Japan　58　(1)　591-591　2003/03/06
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Theory of Doppler shift in unconventional superconductor junctions

Tanaka Y., Itoh H., Asano Y., Tanuma Y., Tsuchiura H., Inoue J., Kashiwaya S.

Meeting abstracts of the Physical Society of Japan　57　(2)　542-542　2002/08/13
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Superconducting and CDW States for the Two-Dimensional Attractive Hubbard Model

YOKOYAMA Hisatoshi, TSUCHIURA Hiroki, TANAKA Yukio

Meeting abstracts of the Physical Society of Japan　57　(2)　532-532　2002/08/13
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Electronic states around vortex cores in high-Tc superconductors

Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　57　(2)　417-417　2002/08/13
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aYJ-5 Electronic states around an impurity in cuprate superconductors

Tsuchiura Hiroki

Meeting abstracts of the Physical Society of Japan　57　(1)　548-548　2002/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pWA-6 Electron density and andferromagnetic correlation around an impurityin strongly correlated electron systems

Tsuchiura Hiroki, Yokoyama Hidetoshi, Ogata Masao, Tanaka Yukio

Meeting abstracts of the Physical Society of Japan　57　(1)　589-589　2002/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Quasiparticle states near the surface of high-T_c superconductors under the magnetic field

Tanuma Y., Tanaka Y., Tsuchiura H., Kashiwaya S.

Meeting abstracts of the Physical Society of Japan　56　(2)　381-381　2001/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Tunneling spectra around a vortex core and an impurity in the t-J model

Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　56　(2)　434-434　2001/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Carrier scattering and antiferromagnetic order around a nonmagnetic impurity in high-Tc superconductors

Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　56　(1)　585-585　2001/03/09
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Local density of states around a nonmagnetic or magnetic impunity in the t-J model

Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　55　(2)　426-426　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
The quasiparticle states around a vortex core in the t-J model

Uno Shingo, Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Inoue Jun-ichiro

Meeting abstracts of the Physical Society of Japan　55　(2)　471-471　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Effects of interface roughness on Josephson junctions of d-wave superconductors II

Shirai Shota, Tsuchiura Hiroki, Tanaka Yukio, Inoue Jun-ichiro

Meeting abstracts of the Physical Society of Japan　55　(2)　469-469　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Magnetic phase diagram of double exchange model for kagome lattice

Ikoma D., Tsuchiura H., Inoue J.

Meeting abstracts of the Physical Society of Japan　55　(2)　483-483　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Effects of interface roughness on Josephson junctions of d-wave superconductors

Shirai Shota, Tsuchiura Hiroki, Tanaka Yukio, Inoue Jun-ichiro

Meeting abstracts of the Physical Society of Japan　55　(1)　525-525　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Local density of states around a nonmagnetic or magnetic impurity in the t-J model

Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　55　(1)　523-523　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27aK-2 Local density of states around a magnetic impurity in the two-dimensional t-J model

Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　54　(2)　574-574　1999/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
26pYP-6 Effects of interface roughness on Josephson junctions of d-wave superconducors II

Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　54　(2)　556-556　1999/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
31p-C-6 The intrinsic Josephon effect in stacks of t-J planes

Kawai Noriaki, Tuchiura Hiroki, Tanaka Yukio, Inoue Jun-ichiro

Meeting abstracts of the Physical Society of Japan　54　(1)　632-632　1999/03/15
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
31p-C-3 Effects of interface roughness on Josephson junctions of d-wave superconductors

Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　54　(1)　632-632　1999/03/15
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Superconducting states with a nodeles gap in the t-t'-J-J' model

TSUCHIURA Hiroki, TANAKA Yukio, OGATA Masao, KASHIWAYA Satoshi

Meeting abstracts of the Physical Society of Japan　53　(2)　689-689　1998/09/05
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
On the pairing state of NCCO

TSUCHIURA Hiroki, TANAKA Yukio, OGATA Masao, KASHIWAYA Satoshi

Meeting abstracts of the Physical Society of Japan　53　(1)　620-620　1998/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
5a-T-8 Impurity effects of the t-J model

Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　52　(2)　600-600　1997/09/16
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
5a-T-6 The local density of states of the electron-doped High-T_c superconductors

Tsuchiura Hiroki, Tanaka Yukio, Ogata Masao, Kashiwaya Satoshi

Meeting abstracts of the Physical Society of Japan　52　(2)　599-599　1997/09/16
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
29a-PS-45 A microscopic theory for photo-stimulated desorption of atoms on metal surface

Tsuchiura H, Kasai H, Okiji A

Meeting abstracts of the Physical Society of Japan　52　(1)　341-341　1997/03/17
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Photostimulated-desorption of atoms and molecules on metal surface

Tsuchiura H., Kasai H., Okiji A.

Abstracts of the meeting of the Physical Society of Japan. Sectional meeting　1996　(2)　600-600　1996/09/13
Publisher: The Physical Society of Japan (JPS)
1a-YA-10 On the rotational excitation of PSD molecules

Tsuchiura H, Kasai H, Okiji A

Abstracts of the meeting of the Physical Society of Japan. Annual meeting　51　(2)　529-529　1996/03/15
Publisher: The Physical Society of Japan (JPS)
29p-PSB-26 A model calculation for desorption induced by electronic transitions

Tsuchiura H., Kasai H., Okiji A.

Abstracts of the meeting of the Physical Society of Japan. Sectional meeting　1995　(2)　501-501　1995/09/12
Publisher: The Physical Society of Japan (JPS)
Anisotropic superconductivity in extended Hubbard model

Tanaka Yukio, Tuchiura Hiroki

Abstracts of the meeting of the Physical Society of Japan. Annual meeting　50　(3)　477-477　1995/03/16
Publisher: The Physical Society of Japan (JPS)
Relation between the state of adsorbed molecule and the internal state of PSD molecule

Tsuchiura H, Kasai H, Okiji A

Abstracts of the meeting of the Physical Society of Japan. Annual meeting　50　(2)　569-569　1995/03/16
Publisher: The Physical Society of Japan (JPS)
3a-PS-10 Mixed s-d Wave Superconductivity on the 2-D Extended Hubbard Model

Tsuchiura Hiroki, Tanaka Yukio

Abstracts of the meeting of the Physical Society of Japan. Sectional meeting　1994　(3)　273-273　1994/08/16
Publisher: The Physical Society of Japan (JPS)

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Books and Other Publications 2

省／脱Dyネオジム磁石と新規永久磁石の開発

佐久間昭正, 土浦宏紀

シーエムシー出版　2015/06/26
スピントロニクスの基礎—磁気の直観的理解をめざして

宮﨑照宣, 土浦宏紀

森北出版　2013/03/27

ISBN: 9784627774612

Presentations 22

Superconducting diode effects in a Kitaev ladder

ChengRong Xie, Hiroki Tsuchiura Manfred Sigris

International Conference on Magnetism　2024/07/03
Josephson effects between the Kitaev ladder superconductors

Osamu Kanehira, Hiroki Tsuchiura

International Conference on Strongly Correlated Electron Systems　2022/07/28
磁性材料特性の理論予測：永久磁石からトポロジカル半金属まで Invited

土浦宏紀

原子スケールシミュレーション活用セミナー2021　2021/09/16
Microscopic analysis of disordered Sm_{1-s}Fe_{5+2s} phases Invited

Takuya Yoshioka, Shogo Yamashita, Hiroki Tsuchiura, Satoshi Hirosawa

The 26th International workshop on rare-earth and future permanent magnets and their applications (REPM2021)　2021/06/09
Theoretical studies on the magnetic properties of Sm(Fe1-xCox)12 systems Invited

Hiroki Tsuchiura

Future Perspectives on Novel Magnetic Materials　2018/06/01
Theoretical study on atomic structures and coercivity in Nd-Fe-B magnets Invited

Hiroki Tsuchiura

TMS 2017 annual meeting　2017/02
希土類磁石における界面および粒界近傍の結晶磁気異方性 Invited

土浦宏紀

日本金属学会2016年春季大会シンポジウム　2016/03
Electronic theory for the magnetic properties on Nd2Fe14B compounds Invited

Hiroki Tsuchiura

ESICMM-G8 symposium　2015/06
Vortex states in iron-based superconductors Invited

Yuhei Kikuchi, Hiroki Tsuchiura

New3SC symposium　2014/10
Electronic theory of Nd-Fe-B permanent magnets Invited

Hiroki Tsuchiura

US-EU-Japan 4th Tri-Lateral Conference　2014/09
Nd2Fe14Bの磁気構造と磁気異方性 Invited

土浦宏紀

日本金属学会2014年春季大会シンポジウム　2014/03
Magnetocrystalline anisotropy of the Fe-sublattice in R₂Fe₁₄B International-presentation

Annual conference on magnetism and magnetic materials　2013/11/04
希土類永久磁石の保磁力機構と電子論 Invited

金属学会　2013/03/27
Non-dispersive charge modulations in the t-t'-t''-J model International-presentation Invited

7th International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials　2009/05/13
Vortex core states in the inhomogeneous superconducting state in high-Tc cuprates International-presentation Invited

9th Hokkaido University - Seoul National University Joint Symposium　2007/01/25
Inhomogeneous superconductivity due to out-of-plane disorder International-presentation Invited

6th International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials　2007/01/09
Competing orders in a d-wave vortex core International-presentation Invited

Fifth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials　2004/06/12
銅酸化物超伝導体の磁束状態・不純物状態の理論 Invited

日本物理学会第58回年次大会　2003/03/28
Vortex core states in the two-dimensional t-J model International-presentation Invited

Fourth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials　2003/01/16
Electronic states around vortex cores in the t-J model International-presentation Invited

2002 International Conference on Physics and Chemistry of Molecular and Oxide Superconductors (MOS2002)　2002/08/12
領域8シンポジウム「強相関系での不純物による新しい量子現象」 Invited

日本物理学会第57回年次大会　2002/03/24
Local magnetic moments around a nonmagnetic impurity in the two-dimensional t-J model International-presentation Invited

Defects in Correlated Electron Systems　2001/07/22

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Research Projects 14

キタエフ模型に基づく新奇デバイスの理論的提案

土浦宏紀

Offer Organization: 日本学術振興会

System: 科学研究費助成事業基盤研究(B)

Category: 基盤研究(B)

Institution: 東北大学

2021/04 - 2024/03

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キタエフ模型には量子スピン型と1次元p波超伝導型の2種類が知られており，どちらもマヨラナ準粒子を伴う．本申請課題においては，これら二つのキタエフ模型を基にした，braidingを伴わない量子計算素子や，マヨラナ準粒子によるスピンまたは量子位相伝播を利用した論理ゲート等の理論的提案を行い，その特性やノイズ耐性の評価および，第一原理計算を援用した材料探索までを包含した，キタエフ模型の実用化に関する新たなアプローチを展開する．まず1次元p波キタエフ模型に関しては，この模型を平行に配置したワイヤー対を一つのユニットとみなし，さらにこのユニット間のジョセフソン接合素子を調べた．このとき，ユニット間の結合強度およびワイヤー対間の位相差を制御することにより，トポロジカルジョセフソン特性に始まり通常の0接合と呼ばれる特性，さらにはπ接合と呼ばれる特性が得られることが判明した．このようなジョセフソン効果の位相-電流特性を外的に制御できる系は，超伝導量子計算メモリ等への応用が期待される．続いて，量子スピン型キタエフ模型に関しては，遍歴マヨラナ粒子による磁気励起伝播の応用可能性について調べた．磁気励起を伝播するデバイスにおいては，その流れのON/OFF制御が重要である．一方で，キタエフ模型における磁気励起を運ぶのは電気的に中世の遍歴マヨラナ粒子であり，外的な擾乱を受けにくい一方で制御が困難である．しかし，キタエフ模型に外部磁場を印加してマヨラナ粒子にエネルギーギャップを与えることにより，磁気励起伝播のON/OFFが可能であることを見出した．
組織形成原理の解明に基づく高保磁力原理の導出及び規則化合金・微粒子磁石の創成と解析

Offer Organization: 国立研究開発法人物質・材料研究機構（NIMS）

System: 元素戦略プロジェクト〈研究拠点形成型〉

Institution: 磁性材料研究拠点（ESICMM）

2012 - 2022/03
Electronic Theory for High-Performance Rare Earth Permanent Magnets

YOSHIOKA Takuya

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2018/04 - 2021/03

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The purpose of this study is to establish a microscopic and quantitative theoretical description of the magnetic properties of rare-earth permanent magnets and to provide guidelines for the development of high-performance magnets. First, we construct a model of the magnetic interaction between localized 4f electrons and conduction electrons, which reproduces the spin-rearrangement transition observed in experiments. Furthermore, for Ce transition metal compounds, which are known to have strong hybridization of 4f-3d orbitals, we constructed a microscopically effective model that incorporates the hybridization effect of the orbitals and verified its validity. As a result, it became possible to qualitatively explain the experimentally observed magnetic anisotropy at finite temperature in a specific parameter region.
Development of VMC with the Wannier localized orbitals and its application to strongly correlated superconductivity in disordered systems

TSUCHIURA Hiroki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2017/04 - 2021/03

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There are two remaining issues in cuprate superconductivity: (i) the possibility of non-doped superconducting transition in T'-type cuprates, and (ii) the origin of the pseudogap state observed in the low carrier density region of T-type ones. For (i), we have investigated the possibility of a superconducting transition within the fluctuation exchange approximation using a two-band effective model that explicitly incorporates the oxygen 2p orbital degrees of freedom in the CuO2 plane, and found that the superconducting transition is possible as reported in experiments. As for (ii), it was found that the experimental findings such as the Fermi arc and charge density wave states can be described satisfactorily by considering the staggered flux state in the realistic band structure.
NOVel, critical materials free, high Anisotropy phases for permanent MAGnets, by design

System: EU-Horizon2020

2016/04 - 2020/03
Research of coloring mechanisums of Fe glass on electron behavior

Kirino Fumiyoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tokyo National University of Fine Arts and Music

2014/04 - 2017/03

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Coloring mechanisms on glass are used by XAFS and computer simulations. From XAFS measurement of metal ions Fe ion is 3, Mn is mixture of 2 and 3 and Co is 4. Pb state is PbO. Pb concentration do not relate to oxidation number. First principle calculation is used combine between CoO2 and SiO2. Absorption of visible light is not at combine of CoO2 and SiO2. Co structure is important.
Exploration of novel quantum phases in multi-component ultracold atomic gases

Yamashita Makoto, MUKAI Tetsuya, INABA Kensuke, IMAI Hiromitsu, SUGA Sei-ichiro, SUZUKI Takafumi, TSUCHIURA Hiroki, TOGA Yuta

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: NTT Basic Research Laboratories

2013/04 - 2016/03

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We explore the novel quantum phases in ultracold atomic gases with the spin degrees of freedom, forming the typical many-body multi-component systems in optical lattices. We have theoretically clarified that Cooper-pairing symmetry of a fermionic superfluid and the dynamical instability of a bosonic superfluid greatly change via the subtle balance in the interactions between the atomic components. We consider such a role of interactions to be a possible origin of diverse quantum phases found in these multi-component systems. On the other hand, we have experimentally created quasi-one-dimensional Bose-Einstein condensates with high density on a persistent-supercurrent atom chip. We observe that the momentum distribution of condensates becomes fragile owing to the quantum fluctuations inherent in this low-dimensional system. We furthermore develop the experimental techniques for controlling atomic spins on an atom chip and then realize the multi-component condensates.
First-principles calculation of conductivity of magnetic alloys and magnetic multilayers

SAKUMA Akimasa, TSUCHIURA Hiroki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2010 - 2012

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Within the framework of the Kubo formula, we developed a calculation tool of conductivity tensor of magnetic materials by using the first principles technique for the electronic structure. Appling this method to the spintronics materials, we studied the effects of chemical disorder and spin fluctuation on the electrical resistivity, anomalous magnetoresistance effects (AMR), anomalous Hall effect and spin polarization.
Study of twp-gap problem of cuprate superconductors using variation method and BdG equation

YOKOYAMA Hisatoshi, OGATA Masao, TSUCHIURA Hiroki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2010 - 2012

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With cuprates in mind, we systematically studied properties of pseudogap and d-wave superconductivity, which are keys to clarify the mechanism of high-Tc cuprates. We mainly applied a variational Monte Carlo method to the Hubbard model. Near half filling, as the interaction strength is increased, every state exhibits, at approximately the band width, a crossover closely related to the Mott transition at half filling. The weakly correlated regime corresponds to a Fermi liquid (BCS superconducting) phase, and the strongly correlate regime to a doped Mott insulating phase, in which physics is dominated by singly occupied sites and the doublon-holon binding effect. Properties of cuprates are consistent to those in the latter regime.
emergence of hidden orders in strongly correlated superconductors ; from sub-nano scale to bulk systems

TSUCHIURA Hiroki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2008 - 2010

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The aim of this research project is to reveal the nature of the pseudo-gap (PG)state in high-Tc cuprates by studying the local structure of hidden order-parameters around vortex cores and stripe states. We find that a stripe-like modulating d-wave RVB state can be a meta-stable state in the bulk systems, and a plausible candidate of the PG state.
Theoretical study on the inter-grain magnetic interaction in the panoscopic assembled rare earth magnetic materials

SAKUMA Akimasa, TSUCHIURA Hiroki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Institution: Tohoku University

2008 - 2008
Theoretical study on the magnetic structures at the interfaces of magnetic multi-layers and the spin dynamics

SAKUMA Akimasa, TSUCHIURA Hiroki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2007 - 2008
パノスコピック形態制御希土類系磁性体における粒間磁気相互作用の電子論的研究

佐久間昭正, 土浦宏紀

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 特定領域研究

Institution: 東北大学

2004 - 2008

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本研究では、ナノスケールで制御された希土類系磁性体の結晶粒間の磁気的相互作用を微視的立場から定量的に把握するため、以下の項目を研究目的とする。 1.種々の希土類金属間化合物のバルク状態での磁気モーメント、磁気異方性エネルギーおよび交換相互作用エネルギーを、密度汎関数法に基づく電子状態の第一原理計算から明らかにする。 2.希土類金属間化合物と他の磁性体の界面における磁気構造と交換相互作用を第一原理計算から調べ、ナノコンポジット磁性体の磁気特性を明らかにする。ここでは、局所スピン密度汎関数法に基づく電子状態の第一原理計算から、Nd_2Fe_<14>X(X=B,C,N,O)のバルク状態およびbcc-Feとの積層構造における磁気特性を評価し、以下の結果を得た。 1)Nd_2Fe_<14>X(X=B,C,N,O)の磁気モーメントは、ほぼXの原子番号の増加とともに大きくなることが示された。特に、X=OにおけるOの磁気モーメントはFeと平行になるという特異的な結果が得られた。2)Feモーメント間の交換相互作用Jijの値はほぼ15meV前後の値であり、同一c面内にあるFe原子間のJijは20meV前後になっていることがわかった。3)結晶場パラメータA^0_2に、Nd自身の価電子雲(5d,6s)の寄与を考慮することでA^0_2は正となり、Nd_2Fe_<14>Bの磁化容易軸方向がc軸であるという実験事実と整合する結果が得られた。但し、本計算の近似の範囲では、A^0_2は実測値の2〜3倍程度の値を示しており、今後の検討課題として残された。4)α-Feの(110)面とNd_2Fe_<14>Bの(100)面を接合した積層構造において、接合の面間距離が1.9Å以下では磁化が反平行結合とになる可能性があることが示された。
Anomalous properties in high-Tc cuprates due to inhomogeneous electronic states

TSUCHIURA Hiroki, SAKUMA Akimasa

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2006 - 2007

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Recent STM/S experiments in Bi_2Sr_2CaCu_2O_<8+δ> (BSCCO) have revealed the existence of nanoscale inhomogeneities, that is, a pattern of patches of two different regions with relatively small and large gap. The most prominent features of the inhomogeneities are (i) the pseudogap phase-like spectra in the large gap regions, (ii) spatially homogeneous subgap spectra both in the small and large gap regions, and (iii) appearance of the unidirectional long-range charge density order. It is suggested that out-of-plane disorder, which is inevitably introduced into cuprates to dope charge carriers, is responsible for the inhomogeneity and the gap structures. The inhomogeneity itself generates intense interest in high-Tc, physics. Moreover, we expect that observations of inhomogeneity may help reveal unsolved problems in this field for which not even a qualitative theoretical explanation is so far available based on homogeneous theoretical models. Therefore, it is important to investigate the inhomogeneity, especially from the viewpoint of the nature of the large gap region. Motivated by these backgrounds, we study spatially modulated d-wave superconducting states in the two-dimensional t-t'-t"-J model within the Bogoliubov-de Gennes theory based on an extended Gutzwiller approximation. We find fully self-consistent solutions involving domain walls with vanishing pairing amplitudes Δ separated by four lattice spacing when the system is about 12.5% hole doping, while 5 at about 15%. The adjacent superconducting domains are in the anti-phase patterns, that is, the relative phase difference between them is π. The Δ=0 domain walls involve concentration of mobile holes due to the loss of the condensation energy. We also find that the superconducting coherence peaks at the energy of the d-wave gap in the local densities of states are strongly suppressed in these states with anti-phase superconducting domain structures.

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Social Activities 11

桐蔭総合大学

2024/03/15 - 2024/03/15
桐蔭総合大学

2017/03/15 -

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和歌山県立桐蔭高校において出張講義を行う
出張講義（数学分野）

2017/01/19 -

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「虚数と物理学」という題目で，高校における数学の学習が将来の学問研究（特に物理学）にどのように活かされるかを紹介し，数学に対する学習意欲の向上に資する．
桐蔭総合大学

2016/03/21 -

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和歌山県立桐蔭高校において出張講義を行う
仙台市立通町小学校出前授業

2015/12/01 -

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5年1組，2組の生徒に対し，「大学でまなぶ科学の世界：超伝導と磁石のはなし」という題目で出前授業を行った．
桐蔭総合大学

2015/03/16 -

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和歌山県立桐蔭高校において，出張講義を行う．
桐蔭総合大学（高校への出張講義）

2014/03/14 -

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和歌山県立桐蔭高校において，出張講義を行う．
1年大学出張講義

2013/12/06 -

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宮城県立泉高校において，1年生を対象に出張講義を行った．
桐蔭総合大学（高校への出張講義）

2013/03/14 -

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和歌山県立桐蔭高校では，「桐蔭総合大学」と称して，全国の大学から教員を招聘して模擬授業を行う機会を設けている．2012年度のこの企画に招聘され，「理論物理と元素戦略：次世代永久磁石をもとめて」という模擬授業を行う．
はじめてのWIEN2k

2011/11/10 -

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第一原理計算ソフトウェアWIEN2kの使用法を，初心者を対象にして解説する．
「はじめてのWIEN2k」株式会社情報機構

2011/02/24 -

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第一限理計算ソフトウェアWIEN2kの使い方を，初心者を対象に説明する．

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NOVel, critical materials free, high Anisotropy phases for permanent MAGnets, by design
文部科学省「ポスト「京」で重点的に取り組むべき社会的・科学的課題に関するアプリケーション開発・研究開発」重点課題

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2020年に稼働開始予定のポスト「京」計算機における活用を目指して，特に磁石・磁性シミュレーションのための計算コードを開発する．
新著紹介（日本物理学会誌）
https://researchmap.jp/read0116580/research_projects/11866943
電子内部自由度制御型ナノデバイス創成原理の構築

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スピンエレクトロニクスにおいて主要な役割を果たすトンネル磁気抵抗素子の作動に関するシミュレーションを行い，素子の効率向上のための設計指針を提示する．