Details of the Researcher

PHOTO

Kazutaka Abe
Section
Research Institute of Electrical Communication
Job title
Associate Professor
Degree

Education 2

  • Osaka University　Graduate School, Division of Engineering Science　物理系専攻

    - 1998/03/25

  • Osaka University　Graduate School, Division of Engineering Science　物理系専攻

    - 1994/03/25

Professional Memberships 2

  • American Physical Society

  • 日本物理学会

Research Interests 3

  • 高圧

  • スピントロニクス

  • 第一原理計算、スピントロニクス、高圧

Research Areas 2

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

  • Natural sciences / Semiconductors, optical and atomic physics /

Papers 32

  1. Structures of hydrogen at terapascal pressures Peer-reviewed

    Kazutaka Abe

    Physical Review B　111　(9)　094103-1-094103-8　2025/03/04

    DOI： 10.1103/PhysRevB.111.094103 　

  2. Metallic silicon subhydrides at high pressures studied by ab initio calculations Peer-reviewed

    Kazutaka Abe

    Physical Review B　103　(13)　134118-1-134118-7　2021/04/28

    DOI： 10.1103/PhysRevB.103.134118 　

  3. Ab initio study of metallic aluminum hydrides at high pressures Peer-reviewed

    Kazutaka Abe

    Physical Review B　100　(17)　174105/1-174105/7　2019/11/13

    DOI： 10.1103/physrevb.100.174105 　

    ISSN： 2469-9950 2469-9969

  4. Search for metallic phases of hydrogen and hydrides Invited Peer-reviewed

    Kazutaka Abe

    The Review of High Pressure Science and Technology　28　(4)　281-290　2018/12

    DOI： 10.4131/jshpreview.28.281 　

  5. High-pressure properties of dense metallic zirconium hydrides studied by ab initio calculations Peer-reviewed

    Kazutaka Abe

    Physical Review B　98　(13)　134103/1-134103/7　2018/10/10

    DOI： 10.1103/physrevb.98.134103 　

    ISSN： 2469-9950 2469-9969

  6. Hydrogen-rich scandium compounds at high pressures Peer-reviewed

    Kazutaka Abe

    PHYSICAL REVIEW B　96　(14)　144108/1-144108/7　2017/10

    DOI： 10.1103/PhysRevB.96.144108 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  7. Stabilization and highly metallic properties of heavy group-V hydrides at high pressures Peer-reviewed

    Kazutaka Abe, N. W. Ashcroft

    PHYSICAL REVIEW B　92　(22)　224109/1-224109/5　2015/12

    DOI： 10.1103/PhysRevB.92.224109 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  8. Quantum disproportionation: The high hydrides at elevated pressures Peer-reviewed

    Kazutaka Abe, N. W. Ashcroft

    PHYSICAL REVIEW B　88　(17)　174110/1-174110/5　2013/11

    DOI： 10.1103/PhysRevB.88.174110 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  9. The origin of perpendicular magneto-crystalline anisotropy in L1(0)-FeNi under tetragonal distortion Peer-reviewed

    Yoshio Miura, Sho Ozaki, Yasushi Kuwahara, Masahito Tsujikawa, Kazutaka Abe, Masafumi Shirai

    JOURNAL OF PHYSICS-CONDENSED MATTER　25　(10)　106005/1-106005/9　2013/03

    DOI： 10.1088/0953-8984/25/10/106005 　

    ISSN： 0953-8984

    eISSN： 1361-648X

  10. Enhanced tunnel magnetoresistance in a spinel oxide barrier with cation-site disorder

    Sukegawa, H., Miura, Y., Muramoto, S., Mitani, S., Niizeki, T., Ohkubo, T., Abe, K., Shirai, M., Inomata, K., Hono, K.

    Physical Review B - Condensed Matter and Materials Physics　86　(18)　2012/11/02

    DOI： 10.1103/PhysRevB.86.184401 　

    ISSN： 1098-0121

  11. Enhanced tunnel magnetoresistance in a spinel oxide barrier with cation-site disorder Peer-reviewed

    Hiroaki Sukegawa, Yoshio Miura, Shingo Muramoto, Seiji Mitani, Tomohiko Niizeki, Tadakatsu Ohkubo, Kazutaka Abe, Masafumi Shirai, Koichiro Inomata, Kazuhiro Hono

    PHYSICAL REVIEW B　86　(18)　184401/1-184401/5　2012/11

    DOI： 10.1103/PhysRevB.86.184401 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  12. First-principles study of tunneling magnetoresistance in Fe/MgAl 2O 4/Fe(001) magnetic tunnel junctions Peer-reviewed

    Yoshio Miura, Shingo Muramoto, Kazutaka Abe, Masafumi Shirai

    Physical Review B - Condensed Matter and Materials Physics　86　(2)　2012/07/20

    DOI： 10.1103/PhysRevB.86.024426 　

    ISSN： 1098-0121 1550-235X

  13. First-principles study of tunneling magnetoresistance in Fe/MgAl2O4/Fe(001) magnetic tunnel junctions Peer-reviewed

    Yoshio Miura, Shingo Muramoto, Kazutaka Abe, Masafumi Shirai

    PHYSICAL REVIEW B　86　(2)　024426/1-024426/6　2012/07

    DOI： 10.1103/PhysRevB.86.024426 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  14. First-principles study of ballistic transport properties in Co 2MnSi/X/Co2MnSi(001) (X= Ag, Au, Al, V, Cr) trilayers Peer-reviewed

    Yoshio Miura, Koichi Futatsukawa, Shohei Nakajima, Kazutaka Abe, Masafumi Shirai

    Physical Review B - Condensed Matter and Materials Physics　84　(13)　2011/10/20

    DOI： 10.1103/PhysRevB.84.134432 　

    ISSN： 1098-0121 1550-235X

  15. First-principles study of ballistic transport properties in Co2MnSi/X/Co2MnSi(001) (X = Ag, Au, Al, V, Cr) trilayers Peer-reviewed

    Yoshio Miura, Koichi Futatsukawa, Shohei Nakajima, Kazutaka Abe, Masafumi Shirai

    PHYSICAL REVIEW B　84　(13)　134432/1-134432/6　2011/10

    DOI： 10.1103/PhysRevB.84.134432 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  16. Crystalline diborane at high pressures Peer-reviewed

    Kazutaka Abe, N. W. Ashcroft

    PHYSICAL REVIEW B　84　(10)　104118/1-104118/5　2011/09

    DOI： 10.1103/PhysRevB.84.104118 　

    ISSN： 1098-0121

  17. Effects of interfacial noncollinear magnetic structures on spin-dependent conductance in Co2MnSi/MgO/Co2MnSi magnetic tunnel junctions: A first-principles study Peer-reviewed

    Yoshio Miura, Kazutaka Abe, Masafumi Shirai

    Physical Review B - Condensed Matter and Materials Physics　83　(21)　2011/06/13

    DOI： 10.1103/PhysRevB.83.214411 　

    ISSN： 1098-0121 1550-235X

  18. Effects of interfacial noncollinear magnetic structures on spin-dependent conductance in Co2MnSi/MgO/Co2MnSi magnetic tunnel junctions: A first-principles study Peer-reviewed

    Yoshio Miura, Kazutaka Abe, Masafumi Shirai

    PHYSICAL REVIEW B　83　(21)　214411/1-214411/6　2011/06

    DOI： 10.1103/PhysRevB.83.214411 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  19. Magnetic properties of the half-metallic Heusler alloys Co2VAl and Co2VGa under pressure Peer-reviewed

    T. Kanomata, Y. Chieda, K. Endo, H. Okada, M. Nagasako, K. Kobayashi, R. Kainuma, R. Y. Umetsu, H. Takahashi, Y. Furutani, H. Nishihara, K. Abe, Y. Miura, M. Shirai

    PHYSICAL REVIEW B　82　(14)　144415/1-144415/7　2010/10

    DOI： 10.1103/PhysRevB.82.144415 　

    ISSN： 1098-0121

  20. Mechanism of large magnetoresistance in Co2MnSi/Ag/Co2MnSi devices with current perpendicular to the plane Peer-reviewed

    Y. Sakuraba, K. Izumi, T. Iwase, S. Bosu, K. Saito, K. Takanashi, Y. Miura, K. Futatsukawa, K. Abe, M. Shirai

    PHYSICAL REVIEW B　82　(9)　094444/1-094444/5　2010/09

    DOI： 10.1103/PhysRevB.82.094444 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  21. Half-metallic interface and coherent tunneling in Co2 YZ/MgO/ Co2 YZ (YZ=MnSi,CrAl) magnetic tunnel junctions: A first-principles study Peer-reviewed

    Yoshio Miura, Hirohisa Uchida, Yoshihiro Oba, Kazutaka Abe, Masafumi Shirai

    Physical Review B - Condensed Matter and Materials Physics　78　(6)　2008/08/18

    DOI： 10.1103/PhysRevB.78.064416 　

    ISSN： 1098-0121 1550-235X

  22. Half-metallic interface and coherent tunneling in Co(2)YZ/MgO/Co(2)YZ (YZ = MnSi,CrAl) magnetic tunnel junctions: A first-principles study Peer-reviewed

    Yoshio Miura, Hirohisa Uchida, Yoshihiro Oba, Kazutaka Abe, Masafumi Shirai

    PHYSICAL REVIEW B　78　(6)　064416/1-064416/9　2008/08

    DOI： 10.1103/PhysRevB.78.064416 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  23. Half-metallicity at the (110) interface between a full Heusler alloy and GaAs Peer-reviewed

    K Nagao, Y Miura, M Shirai

    PHYSICAL REVIEW B　73　(10)　104447/1-104447/7　2006/03

    DOI： 10.1103/PhysRevB.73.104447 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  24. Atomic disorder effects on half-metallicity of the full-Heusler alloys Co2(Cr1-xFex)A1: A first-principles study Peer-reviewed

    Yoshio Miura, Kazutaka Nagao, Masafumi Shirai

    Physical Review B - Condensed Matter and Materials Physics　69　(14)　1-144413　2004/04

    DOI： 10.1103/PhysRevB.69.144413 　

    ISSN： 0163-1829

  25. First-principles study of adhesion at Cu/SiO2 interfaces Peer-reviewed

    K Nagao, JB Neaton, NW Ashcroft

    PHYSICAL REVIEW B　68　(12)　125403/1-125403/8　2003/09

    DOI： 10.1103/PhysRevB.68.125403 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  26. Enhanced friedel structure and proton pairing in dense solid hydrogen Peer-reviewed

    K Nagao, SA Bonev, A Bergara, NW Ashcroft

    PHYSICAL REVIEW LETTERS　90　(3)　035501/1-035501/4　2003/01

    DOI： 10.1103/PhysRevLett.90.035501 　

    ISSN： 0031-9007

  27. Cusp-condition constraints and the thermodynamic properties of dense hot hydrogen Peer-reviewed

    K Nagao, SA Bonev, NW Ashcroft

    PHYSICAL REVIEW B　64　(22)　224111/1-224111/12　2001/12

    DOI： 10.1103/PhysRevB.64.224111 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  28. Zero-point energy of the proton motions and its effect on the pressure of molecular dissociation in dense hydrogen Peer-reviewed

    T Takezawa, K Nagao, H Nagara

    JOURNAL OF LOW TEMPERATURE PHYSICS　123　(5-6)　315-329　2001/06

    DOI： 10.1023/A:1017507731988 　

    ISSN： 0022-2291

  29. Ab initio calculation of optical-mode frequencies in compressed solid hydrogen Peer-reviewed

    K Nagao, T Takezawa, H Nagara

    PHYSICAL REVIEW B　59　(21)　13741-13753　1999/06

    DOI： 10.1103/PhysRevB.59.13741 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  30. Vibrons and phonons in solid hydrogen at megabar pressures Peer-reviewed

    H Nagara, K Nagao

    JOURNAL OF LOW TEMPERATURE PHYSICS　111　(3-4)　483-488　1998/05

    DOI： 10.1023/A:1022272711522 　

    ISSN： 0022-2291

  31. Theoretical study of Raman and infrared active vibrational modes in highly compressed solid hydrogen Peer-reviewed

    K Nagao, H Nagara

    PHYSICAL REVIEW LETTERS　80　(3)　548-551　1998/01

    DOI： 10.1103/PhysRevLett.80.548 　

    ISSN： 0031-9007

  32. Structures of hydrogen at megabar pressures Peer-reviewed

    K Nagao, H Nagara, S Matsubara

    PHYSICAL REVIEW B　56　(5)　2295-2298　1997/08

    DOI： 10.1103/PhysRevB.56.2295 　

    ISSN： 0163-1829

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Misc. 26

  1. 7pPSA-92 Theoretical design of Co-based Heusler alloys undergoing magnetostructural phase transformation

    Kano S., Tsujikawa M., Abe K., Shirai M.

    Meeting abstracts of the Physical Society of Japan　69　(2)　283-283　2014/08/22

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  2. 20pCC-8 A first-principles study on spin-dependent transport of MTJs with MgAl_2O_4

    Miura Y., Muramoto S., Abe K., Shirai M.

    Meeting abstracts of the Physical Society of Japan　67　(2)　433-433　2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  3. 21aPS-38 A first-principles study on exchange coupling at interface of Heusler alloys and MgO

    Miura Y., Abe K., Shirai M.

    Meeting abstracts of the Physical Society of Japan　66　(2)　381-381　2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  4. 26aPS-43 A first-principles study on exchange coupling at interface of transition metal alloys and MgO

    Miura Yoshio, Abe Kazutaka, Shirai Masafumi

    Meeting abstracts of the Physical Society of Japan　66　(1)　494-494　2011/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  5. 25pWX-1 Theoretical study on ballistic conductance of magnetic tunnel junctions with interfacial non-collinear magnetic structures

    Miura Yoshio, Abe Kazutaka, Shirai Masafumi

    Meeting abstracts of the Physical Society of Japan　65　(2)　428-428　2010/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  6. 20aPS-27 A first-principles study on ballistic conductance of magnetic nanowires with a domain wall

    Miura Yoshio, Abe Kazutaka, Shirai Masafumi

    Meeting abstracts of the Physical Society of Japan　65　(1)　454-454　2010/03/01

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  7. Half-metallic behavior of Co2MnSi/Co2MnAl/MgO interface and its coherent tunneling conductance Peer-reviewed

    Yoshio Miura, Kazutaka Abe, Masafumi Shirai

    Journal of Physics: Conference Series　200　(5)　052016/1-052016/4　2010

    Publisher: Institute of Physics Publishing

    DOI： 10.1088/1742-6596/200/5/052016 　

    ISSN： 1742-6596 1742-6588

  8. Computational Design of Highly Spin Polarized Hetero Junction Between Heusler Alloys and MgO(Spin Electronics)

    Miura Y, Abe K, Shirai M

    Journal of the Magnetics Society of Japan　33　(2)　105-109　2009/03/01

    Publisher: The Magnetics Society of Japan (MSJ)

    DOI： 10.3379/msjmag.0901RE8062 　

    ISSN： 1882-2924

    More details Close

    We investigate and discuss electronic structures and tunneling conductance of magnetic tunnel junctions (MTJs) with the Co_2CrGa and MgO on the basis of the density-functional first-principles calculations. We found that the CrGa-terminated Co_2CrGa/MgO (001) junction has no interface states and preserves the high spin-polarization of Co_2CrGa at the interface. We showed that the large enhancement of the interfacial Cr spin moment plays an important role to make the half-metallic gap in the CrGa-terminated Co_2CrGa/MgO(001) interface. Finally, we have proposed that addition of an ultrathin ...

  9. The effect of the interface oxidation on tunneling conductance of Co2MnSi/MgO/Co2MnSi magnetic tunnel junction Peer-reviewed

    Yoshio Miura, Kazutaka Abe, Masafumi Shirai

    JOURNAL OF PHYSICS-CONDENSED MATTER　21　(6)　064245/1-064245/6　2009/02

    DOI： 10.1088/0953-8984/21/6/064245 　

    ISSN： 0953-8984

    eISSN： 1361-648X

  10. Half-metallic interface between a Heusler alloy and Si Peer-reviewed

    Kazutaka Abe, Yoshio Miura, Yasunori Shiozawa, Masafumi Shirai

    JOURNAL OF PHYSICS-CONDENSED MATTER　21　(6)　064244/1-064244/5　2009/02

    DOI： 10.1088/0953-8984/21/6/064244 　

    ISSN： 0953-8984

    eISSN： 1361-648X

  11. Theoretical Studies on Spin-Dependent Conductance in FePt/MgO/FePt(001) Magnetic Tunnel Junctions Peer-reviewed

    Yujiro Taniguchi, Yoshio Miura, Kazutaka Abe, Masafumi Shirai

    IEEE TRANSACTIONS ON MAGNETICS　44　(11)　2585-2588　2008/11

    DOI： 10.1109/TMAG.2008.2002515 　

    ISSN： 0018-9464

    eISSN： 1941-0069

  12. The computational materials design of (Ga,Cr)N: effects of co-doping on exchange interactions Peer-reviewed

    Tatsuya Nakano, Masafumi Shirai, Yoshio Miura, Kazutaka Nagao

    JOURNAL OF PHYSICS-CONDENSED MATTER　19　(36)　365238/1-365238/6　2007/09

    DOI： 10.1088/0953-8984/19/36/365238 　

    ISSN： 0953-8984

    eISSN： 1361-648X

  13. Coherent tunnelling conductance in magnetic tunnel junctions of half-metallic full Heusler alloys with MgO barriers Peer-reviewed

    Yoshio Miura, Hirohisa Uchida, Yoshihiro Oba, Kazutaka Nagao, Masafumi Shirai

    JOURNAL OF PHYSICS-CONDENSED MATTER　19　(36)　365228/1-365228/7　2007/09

    DOI： 10.1088/0953-8984/19/36/365228 　

    ISSN： 0953-8984

    eISSN： 1361-648X

  14. 22aPS-132 Ab initio calculations of the magnetoresistance of half-metal/insulator heterostructures

    Abe K., Miura Y., Shirai M.

    Meeting abstracts of the Physical Society of Japan　62　(2)　695-695　2007/08/21

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  15. Theoretical studies on the influence of oxygen impurity upon magnetic properties of (Ga,Cr)N Peer-reviewed

    Tatsuya Nakano, Masafumi Shirai, Yoshio Miura, Kazutaka Nagao

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　310　(2)　2155-2157　2007/03

    DOI： 10.1016/j.jmmm.2006.11.036 　

    ISSN： 0304-8853

  16. Ab initio study on stability of half-metallic Co-based full-Heusler alloys Peer-reviewed

    Yoshio Miura, Masafumi Shirai, Kazutaka Nagao

    JOURNAL OF APPLIED PHYSICS　99　(8)　8J112/1-8J112/3　2006/04

    DOI： 10.1063/1.2176907 　

    ISSN： 0021-8979

  17. The exchange interaction in (Ga,Cr)N doped with oxygen impurities Peer-reviewed

    Tatsuya Nakano, Masafumi Shirai, Yoshio Miura, Kazutaka Nagao

    PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 3, NO 12　3　(12)　4147-4150　2006

    DOI： 10.1002/pssc.200672842 　

    ISSN： 1862-6351

  18. Ab initio calculations of spin polarization at Co2CrAl/GaAs interfaces Peer-reviewed

    Kazutaka Nagao, Masafumi Shirai, Yoshio Miura

    Journal of Physics Condensed Matter　16　(48)　S5725-S5728　2004/12/08

    DOI： 10.1088/0953-8984/16/48/036 　

    ISSN： 0953-8984

  19. First-principles design of ferromagnetic nanostructures based on group-IV semiconductors Peer-reviewed

    Yoshio Miura, Masafumi Shirai, Kazutaka Nagao

    Journal of Physics Condensed Matter　16　(48)　S5735-S5738　2004/12/08

    DOI： 10.1088/0953-8984/16/48/038 　

    ISSN： 0953-8984

  20. First-principles study on half-metallicity of disordered Co 2(Cr1-xFex)Al Peer-reviewed

    Yoshio Miura, Masafumi Shirai, Kazutaka Nagao

    Journal of Applied Physics　95　(11)　7225-7227　2004/06/01

    DOI： 10.1063/1.1669115 　

    ISSN： 0021-8979

  21. Ab initio calculations of zinc-blende CrAs/GaAs superlattices Peer-reviewed

    K Nagao, M Shirai, Y Miura

    JOURNAL OF APPLIED PHYSICS　95　(11)　6518-6520　2004/06

    DOI： 10.1063/1.1687553 　

    ISSN： 0021-8979

  22. Ab initio calculation of the zero-point energy in dense hydrogen Peer-reviewed

    T Takezawa, H Nagara, K Nagao

    JOURNAL OF PHYSICS-CONDENSED MATTER　14　(44)　10411-10414　2002/11

    DOI： 10.1088/0953-8984/14/44/302 　

    ISSN： 0953-8984

  23. Frequencies and IR properties of vibrational modes of highly compressed hydrogen Peer-reviewed

    Kazutaka Nagao, Tomoki Takezawa, Hitose Nagara

    Science and Technology of High Pressure　1　368-371　2000

  24. Study of the structures of solid hydrogen at megabar pressures by means of first-principles calculations Peer-reviewed

    H Nagara, K Nagao, T Takezawa

    JOURNAL OF PHYSICS-CONDENSED MATTER　10　(49)　11191-11201　1998/12

    DOI： 10.1088/0953-8984/10/49/009 　

    ISSN： 0953-8984

  25. Infrared activity of vibrational modes in compressed molecular hydrogen: a first-principles study using the geometric phase approach Peer-reviewed

    K Nagao, H Nagara

    JOURNAL OF PHYSICS-CONDENSED MATTER　10　(49)　11581-11584　1998/12

    DOI： 10.1088/0953-8984/10/49/049 　

    ISSN： 0953-8984

  26. Atomic and Molecular Phases of Hydrogen at Megabar Pressures Peer-reviewed

    Kazutaka Nagao, Hitose Nagara

    Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu　7　775-777　1998

    DOI： 10.4131/jshpreview.7.775 　

    ISSN： 1348-1940 0917-639X

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Books and Other Publications 2

  1. Epitaxial Ferromagnetic Films and Spintronic Applications

    M. Shirai, Y. Miura, K. Abe

    Research Signpost, Kerala, India　2009

  2. Half-metallic Alloys: Fundamentals and Applications

    Hiro Akinagao, Masaki Mizuguchi, Kazutaka Nagao, Yoshio Miura, Masafumi Shirai

    Springer　2005

Presentations 39

  1. Structures of dense atomic hydrogen: Anharmonic zero-point energy and structure relaxation

    Kazutaka Abe

    The Physical Society of Japan, 2026 Spring Meeting　2026/03/24

  2. Ab initio structure study of atomic phases of dense hydrogen

    Kazutaka Abe

    JPS 2024 Spring Meeting　2024/03/19

  3. Effects of anharmonic zero-point energy on structures of hydrogen at terapascal pressures

    Kazutaka Abe

    JPS 2023 Spring Meeting　2023/03/22

  4. 高密度シリコン水素化合物における金属化と超伝導の第一原理計算

    阿部和多加

    日本物理学会第76回年次大会　2021/03/14

  5. アルミニウム水素化合物の高圧金属相

    阿部和多加

    日本物理学会2019年秋季大会　2019/09/12

  6. 高密度ジルコニウム水素化合物の第一原理構造探索

    阿部和多加

    日本物理学会 第73回年次大会　2018/03/23

  7. スカンジウム水素化合物の高圧金属相

    阿部和多加

    日本物理学会 第72回年次大会　2017/03/18

  8. Bi及びSb水素化合物の高圧金属相

    阿部和多加, N. W. Ashcroft

    日本物理学会 第71回年次大会　2016/03/19

  9. 高密度水素の分子解離圧に対する非調和零点エネルギーの効果

    阿部和多加, N. W. Ashcroft

    日本物理学会 第70回年次大会　2015/03/22

  10. 高圧におけるGeH3の安定性と超伝導

    阿部和多加, N. W. Ashcroft

    日本物理学会 2013年秋季大会　2013/09/27

  11. ホウ化水素における圧力誘起金属化と超伝導

    阿部和多加, N. W. Ashcroft

    日本物理学会 2012年秋季大会　2012/09/21

  12. An ab initio Study on the Tunneling Magnetoresistance in FePt/Fen/MgO/Fen/FePt (n = 0-4) Magnetic Tunnel Junctions International-presentation

    M. Suzuki, K. Abe, Y. Miura, M. Shirai

    6th RIEC International Workshop on Spintronics　2010/02/05

  13. High spin polarization at Heusler-alloy/silicon interface International-presentation

    K. Abe, Y. Miura, Y. Shiozawa, M. Shirai

    53rd Annual Conference on Magnetism and Magnetic Materials　2008/11/10

  14. Highly spin-polarized interfaces between a half-metallic Heusler alloy and silicon International-presentation

    K. Abe, Y. Miura, Y. Shiozawa, M. Shirai

    21st Congress and General Assembly of the International Union of Crystallography　2008/08/23

  15. Half-metallic interface between a Heusler alloy and Si International-presentation

    K. Abe, Y. Miura, Y. Shiozawa, M. Shirai

    International Conference on Quantum Simulators and Design 2008　2008/05/31

  16. ハーフメタル／絶縁体ヘテロ構造における磁気抵抗の第一原理計算

    阿部和多加, 三浦良雄, 白井正文

    日本物理学会第62回年次大会　2007/09/21

  17. Co2CrAl/GaAsヘテロ構造におけるトンネル磁気抵抗の第一原理計算

    長尾和多加, 三浦良雄, 白井正文

    日本物理学会2007年春 春季大会　2007/03/18

  18. Spin polarization and transport properties of Co2CrAl/GaAs heterostructure International-presentation

    K. Nagao, Y. Miura, M. Shirai

    International Conference on Quantum Simulators and Design　2006/12/03

  19. Highly spin-polarized interface between full Heusler alloy and semiconductor International-presentation

    K. Nagao, Y. Miura, M. Shirai

    International Conference on Magnetism　2006/08/20

  20. 完全スピン偏極ホイスラー合金／半導体界面の第一原理計算

    長尾和多加, 三浦良雄, 白井正文

    日本物理学会2005年春 第60回年次大会　2005/03/24

  21. ホイスラー合金／GaAs界面電子状態の面方位依存性

    長尾和多加, 三浦良雄, 白井正文

    2004年秋季 第65回応用物理学会学術講演会　2004/09/01

  22. Electronic structures of half-metal/GaAs interfaces International-presentation

    K. Nagao, Y. Miura, M. Shirai

    The 3rd International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors　2004/07/21

  23. Zinc-blende CrAs/GaAs多層膜のスピン偏極率

    長尾和多加, 三浦良雄, 白井正文

    2004年春季 第51回応用物理学関係連合講演会　2004/03/28

  24. Ab initio calculations of zinc-blende CrAs/GaAs superlattices International-presentation

    K. Nagao, Y. Miura, M. Shirai

    9th Joint MMM/INTERMAG Conference　2004/01/05

  25. Cu/SiO2界面の構造及び結合強度の第一原理計算による研究

    長尾和多加, J. B. Neaton, N. W. Ashcroft

    日本物理学会2003年秋 秋季大会　2003/09/20

  26. ホイスラー合金表面及び界面におけるスピン偏極率の第一原理計算による研究

    長尾和多加, 三浦良雄, 白井正文

    2003年秋季 第64回応用物理学会学術講演会　2003/08/30

  27. Equation of state of hot dense hydrogen and cusp-condition constraints International-presentation

    K. Nagao, S. A. Bonev, N. W. Ashcroft

    APS March Meeting　2002/03/18

  28. Ab initio study of adhesion at the Cu/SiO2 interface International-presentation

    K. Nagao, J. B. Neaton, N. W. Ashcroft

    APS March Meeting　2002/03/18

  29. Response with cusp-condition constraints and thermodynamic properties of dense liquid hydrogen International-presentation

    K. Nagao, S. A. Bonev, N. W. Ashcroft

    ES2001 - Thirteenth annual Workshop on Recent Developments in Electronic Structure Algorithms　2001/06/15

  30. Study of dense liquid hydrogen: effect of non-linear response on electron-proton coupling International-presentation

    K. Nagao, N. W. Ashcroft

    CECAM workshop on "Physical properties of dense fluid Hydrogen: Recent experiments and new theoretical concepts.”　2000/08/01

  31. Highly compressed hydrogen at elevated temperatures International-presentation

    K. Nagao, N. W. Ashcroft

    Gordon Research Conference, Research at High Pressure　2000/06/25

  32. Study of Pressure-induced Molecular Dissociation in Solid Hydrogen International-presentation

    K. Nagao, T. Takezawa, H. Nagara

    APS March Meeting　2000/03/20

  33. Frequencies and IR Properties of Vibrational Modes of Highly Compressed Hydrogen International-presentation

    K. Nagao, T. Takezawa, H. Nagara

    AIRAPT-17, International Conference on High Pressure Science and Technology　1999/07/25

  34. Study of IR-intensities of vibrational modes in compressed hydrogen through the geometric phase approach International-presentation

    K. Nagao, H. Nagara

    Gordon Research Conference, Research at High Pressure　1998/06/21

  35. Infrared activity of vibrational modes in compressed molecular hydrogen: a first-principles study using the geometric phase approach International-presentation

    K. Nagao, H. Nagara

    Oji International Seminar on the Quest for New Physical Phases under Extreme Conditions　1998/05/31

  36. Mbar領域における分子性固体水素のラマンおよび赤外活性振動モード

    長尾和多加, 長柄一誠

    日本物理学会1997年秋 秋の分科会　1997/10/05

  37. Atomic and molecular phases of hydrogen at megabar pressures International-presentation

    K. Nagao, H. Nagara

    AIRAPT-16, International Conference on High Pressure Science and Technology　1997/08/25

  38. 超高圧縮水素におけるラマンおよび赤外活性振動モード

    長尾和多加, 長柄一誠

    日本物理学会1997年春 第52回年会　1997/03/28

  39. 高密度水素の圧力誘起分子解離

    長尾和多加, 長柄一誠

    日本物理学会 1996年秋の分科会　1996/10/01

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Research Projects 7

  1. Development of methods for analyzing anharmonic phonons and their application to structure searches in dense hydrogen and hydrides

    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

    2021/04 - 2024/03

  2. Theoretical study of metallization and superconductivity of hydrides Competitive

    ABE Kazutaka

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

    2013/04 - 2016/03

  3. SourcesTheoretical Design of Efficient Spin Sources

    SHIRAI Masafumi, MIURA Yoshio, ABE Kazutaka, ODA Tatsuki, KIMURA Akio

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Priority Areas

    Institution: Tohoku University

    2007 - 2010

    More details Close

    We carried out theoretical design of efficient spin sources on the basis of first-principles calculations in order to improve the output of magnetoresistive devices with use of highly spin-polarized materials (half metals) or perpendicularly magnetized materials and to improve the efficiency of spin injection into semiconductors. We successfully proposed the hetero-junctions which preserve high spin polarization even at the interfaces between half metals and non-magnetic materials. We elucidated the effects of atomic disorder or thermal fluctuation of spin configurations on spin-dependent transport properties. We also investigated the modulation of magnetic anisotropy by external electric field.

  4. スピン機能材料のデザイン及びスピン偏極電流解析手法の開発・応用 Competitive

    System: Grant-in-Aid for Scientific Research

    2005/07 - 2009/03

  5. トンネル磁気抵抗の第一原理計算 Competitive

    System: Grant-in-Aid for Scientific Research

    2006/04 - 2008/03

  6. Coordinate Group for Computational Real Materials Design

    KASAI Hideaki, HIROSE Kikuji, NAGAE Hitose, SATOU Kazunori, ABE Kazutaka, OSHIYAMA Atsushi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Priority Areas

    Institution: Osaka University

    2005 - 2008

  7. 磁性金属／誘電体・半導体界面における構造とスピン偏極率 Competitive

    System: Grant-in-Aid for Scientific Research

    2004/04 - 2006/03

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