Details of the Researcher

PHOTO

Kenya Ohgushi
Section
Graduate School of Science
Job title
Professor
Degree
  • 工学博士 (The University of Tokyo)

Research History 5

  • 2014/04 - Present
    東北大学 大学院理学研究科 物理学専攻 教授

  • 2012/04 - 2014/03
    東京大学 物性研究所 特任准教授

  • 2008/01 - 2012/03
    東京大学 物性研究所 特任講師

  • 2007/04 - 2008/01
    理化学研究所 基礎科学特別研究員

  • 2004/04 - 2007/03
    日本学術振興会 特別研究員

Professional Memberships 2

  • アメリカ物理学会

  • 日本物理学会

Research Interests 4

  • 遷移金属化合物

  • 超伝導

  • 磁性

  • 強相関電子系

Research Areas 1

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

Papers 133

  1. Orbital magnetic moments in FeCr2S4 studied by x-ray magnetic circular dichroism

    V. K. Verma, J. Patra, V. R. Singh, Y. Nonaka, G. Shibata, K. Ishigami, A. Tanaka, K. Ohgushi, Y. Tokura, T. Koide, A. Fujimori

    PHYSICAL REVIEW B 112 (10) 2025/09/29

    DOI: 10.1103/hdzg-mn6r  

    ISSN: 2469-9950

    eISSN: 2469-9969

  2. Separation of Magnetism and Orbital Order in Superconducting Iron-Ladders: Signature of Hund's Metallic State near Its Superconductivity

    Kou Takubo, Kohei Yamamoto, Kota Murota, Naoki Moritsuna, Kohei Yamagami, Yasuyuki Hirata, Hiroki Wadati, Ronny Sutarto, Kazuki Hashizume, Satoshi Imaizumi, Takuya Aoyama, Yoshinori Imai, Kenya Ohgushi, Takashi Mizokawa

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 94 (9) 2025/09/15

    DOI: 10.7566/JPSJ.94.093701  

    ISSN: 0031-9015

  3. Evolution of phonon, magnetism, and electronic excitations across the insulator-to-metal transition in Ru(Br1-xIx)3

    Youngsu Choi, Dirk Wulferding, Seungyeol Lee, Fuki Sato, Yoshinori Imai, Kenya Ohgushi, Beom Hyun Kim, Kwang-Yong Choi

    PHYSICAL REVIEW B 112 (2) 2025/07/08

    DOI: 10.1103/lrmc-1cty  

    ISSN: 2469-9950

    eISSN: 2469-9969

  4. Revisiting the piezomagnetic effect in the rutile fluorides MnF2 and CoF2

    Minato Komuro, Takuya Aoyama, Kenya Ohgushi

    PHYSICAL REVIEW B 111 (21) 2025/06/30

    DOI: 10.1103/t3xl-bxfv  

    ISSN: 2469-9950

    eISSN: 2469-9969

  5. Nonferroelectric phase with loss of cycloidal magnetic structure in Tb0.515⁢Gd0.485⁢Mn2⁢O5

    Yuta Ishii, Terutoshi Sakakura, Yoshihisa Ishikawa, Ryoji Kiyanagi, Jana Lustikova, Takuya Aoyama, Kenya Ohgushi, Yusuke Wakabayashi, Hiroyuki Kimura, Yukio Noda

    Physical Review B 110 (18) 2024/11/12

    Publisher: American Physical Society (APS)

    DOI: 10.1103/physrevb.110.184404  

    ISSN: 2469-9950

    eISSN: 2469-9969

  6. Structural and Electronic Properties of RuX3 (X = Br and I) under High Pressure

    Fuki Sato, Takuya Aoyama, Saori Kawaguchi, Hirotada Gotou, Yoshinori Imai, Kenya Ohgushi

    Journal of the Physical Society of Japan 2024/09/15

    DOI: 10.7566/JPSJ.93.093601  

  7. Continuous structural phase transition and antiferromagnetic order in ilmenite-type NiVO3 Peer-reviewed

    Hajime Yamamoto, Osamu Ikeda, Takashi Honda, Kenta Kimura, Takuya Aoyama, Kenya Ohgushi, Akio Suzuki, Kenji Ishii, Daiju Matsumura, Takuya Tsuji, Shintaro Kobayashi, Shogo Kawaguchi, Matteo d’Astuto, Tadashi Abukawa

    Physical Review Materials 8 (9) 2024/09/03

    Publisher: American Physical Society (APS)

    DOI: 10.1103/physrevmaterials.8.094402  

    eISSN: 2475-9953

  8. Observation of Thermally Induced Piezomagnetic Switching in Cu2OSeO3 Polymorph Synthesized under High‐Pressure

    Hung‐Cheng Wu, Takuya Aoyama, Daisuke Morikawa, Daisuke Okuyama, Kazuhiro Nawa, Wei‐tin Chen, Chan‐Hung Lu, Tsung‐Wen Yen, Shin‐Ming Huang, Stuart Calder, Shuki Torii, Kenya Ohgushi, Masami Terauchi, Taku J. Sato

    Advanced Physics Research 2024/08/05

    Publisher: Wiley

    DOI: 10.1002/apxr.202400054  

    ISSN: 2751-1200

    eISSN: 2751-1200

    More details Close

    Abstract A polymorph of Cu2OSeO3 with the distorted kagome lattice is successfully obtained using the high‐pressure synthesis technique (Cu2OSeO3‐HP). The structural analysis using X‐ray and neutron powder diffraction suggests that the tetrahedral Cu2+ clusters [similar to those in Cu2OSeO3 ambient‐pressure phase (Cu2OSeO3‐AP)] exist in Cu2OSeO3‐HP but with three symmetry inequivalent sites. No structural change is observed between 1.5 K and the room temperature. The complex magnetic H‐T phase diagram is established based on the temperature‐ and field‐dependent magnetization data, indicating two distinct antiferromagnetic phases at low and intermediate temperatures, in addition to the higher‐temperature spin‐glass‐like phase. The low temperature phase is identified by neutron powder diffraction refinements as a canted noncollinear antiferromagnetic order with a weak ferromagnetic component along the b‐axis. Size of the refined ordered moment is ≈1.00(4) µB in Cu2OSeO3‐HP, indicating a large enhancement compared to that of Cu2OSeO3‐AP (≈0.61 µB). By applying a uniaxial stress, finite enhancement of weak ferromagnetic component in the noncollinear antiferromagnetic phase in Cu2OSeO3‐HP is observed, which is the clear evidence of the piezomagnetic effect. Interestingly, the sign of the induced magnetization changes on heating from the low‐temperature to the intermediate‐temperature phases, indicating a novel piezomagnetic switching effect in this compound.

  9. $J$=$\frac{1}{2}$ pseudospins and $d\text{\ensuremath{- } }p$ hybridization in the Kitaev spin liquid candidates $\mathrm{Ru}{X}_{3}$ ($X$=Cl, Br, I) International-journal Peer-reviewed

    H. Gretarsson, H. Fujihara, F. Sato, H. Gotou, Y. Imai, K. Ohgushi, B. Keimer, H. Suzuki

    Physical Review B 109 (18) L180413-1-L180413-7 2024/05

    Publisher: American Physical Society (APS)

    DOI: 10.1103/physrevb.109.l180413  

    ISSN: 2469-9950

    eISSN: 2469-9969

  10. Piezomagnetic properties in altermagnetic MnTe

    Takuya Aoyama, Kenya Ohgushi

    Physical Review Materials 8 (4) L041402/1-L041402/5 2024/04/01

    Publisher: American Physical Society (APS)

    DOI: 10.1103/physrevmaterials.8.l041402  

    eISSN: 2475-9953

  11. Observation of a giant band splitting in altermagnetic MnTe

    T. Osumi, S. Souma, T. Aoyama, K. Yamauchi, A. Honma, K. Nakayama, T. Takahashi, K. Ohgushi, T. Sato

    Physical Review B 109 (11) 115102/1-115102/8 2024/03/01

    Publisher: American Physical Society (APS)

    DOI: 10.1103/physrevb.109.115102  

    ISSN: 2469-9950

    eISSN: 2469-9969

  12. Thermal multiferroics in all-inorganic quasi-two-dimensional halide perovskites Peer-reviewed

    Tong Zhu, Xue-Zeng Lu, Takuya Aoyama, Koji Fujita, Yusuke Nambu, Takashi Saito, Hiroshi Takatsu, Tatsushi Kawasaki, Takumi Terauchi, Shunsuke Kurosawa, Akihiro Yamaji, Hao-Bo Li, Cédric Tassel, Kenya Ohgushi, James M. Rondinelli, Hiroshi Kageyama

    Nature Materials 23 182-188 2024/02

    DOI: 10.1038/s41563-023-01759-y  

  13. Insulator-metal transition in Ru(Br1-x Ix)3 with honeycomb structure

    Fuki Sato, Hideyuki Fujihara, Hirotada Gotou, Takuya Aoyama, Yoshinori Imai, Kenya Ohgushi

    Physical Review B 109 (3) 035154/1-035154/5 2024/01/15

    DOI: 10.1103/PhysRevB.109.035154  

    ISSN: 2469-9950

    eISSN: 2469-9969

  14. Magnetism in the Kitaev quantum spin liquid candidate RuBr3

    T. Weinhold, C. Wang, F. Seewald, V. Grinenko, Y. Imai, F. Sato, K. Ohgushi, H. H. Klauss, R. Sarkar

    Physical Review B 109 (1) 014440/1-014440/5 2024/01/01

    DOI: 10.1103/PhysRevB.109.014440  

    ISSN: 2469-9950

    eISSN: 2469-9969

  15. Pressure-induced switching of electronic nematicity in the iron-based ladder materials Formula Presented Formula Presented

    Takuya Aoyama, Rinto Nojima, Touru Yamauchi, Yoshinori Imai, Kenya Ohgushi

    Physical Review B 108 (9) 094507/1-094507/6 2023/09/01

    DOI: 10.1103/PhysRevB.108.094507  

    ISSN: 2469-9950

    eISSN: 2469-9969

  16. Magnetic and spin-orbit exciton excitations in the honeycomb lattice compound RuBr3 Peer-reviewed

    Youngsu Choi, Je Ho Lee, Seungyeol Lee, Dirk Wulferding, Hideyuki Fujihara, Fuki Sato, Yoshinori Imai, Kenya Ohgushi, Maeng Je Seong, Kwang Yong Choi

    Physical Review B 106 (17) 2022/11/01

    DOI: 10.1103/PhysRevB.106.174430  

    ISSN: 2469-9950

    eISSN: 2469-9969

  17. Light-induced magnetization driven by interorbital charge motion in the spin-orbit assisted Mott insulator 𝛼−RuCl3

    T. Amano, Y. Kawakami, H. Itoh, K. Konno, Y. Hasegawa, T. Aoyama, Y. Imai, K. Ohgushi, Y. Takeuchi, Y. Wakabayashi, K. Goto, Y. Nakamura, H. Kishida, K. Yonemitsu, S. Iwai

    Physical Review Research 4 (3) 2022/08/19

    Publisher: American Physical Society (APS)

    DOI: 10.1103/physrevresearch.4.l032032  

    eISSN: 2643-1564

  18. Enhanced anisotropic magnetoresistance in the odd-parity multipole-ordered conductor Ba1−xKxMn2As2

    Takuya Aoyama, Masahiro Kudo, Kaoru Igarashi, Kazutoshi Emi, Shojiro Kimura, Yoshinori Imai, Kenya Ohgushi

    Physical Review B 2022/06/28

    DOI: 10.1103/PhysRevB.105.224422  

  19. Persistent Spin–Orbit Mott Insulating State in Highly Compressed Post-Perovskite CaIrO3

    Takuya Aoyama, Kenji Ohta, Katsuya Shimizu, Kenya Ohgushi

    Journal of the Physical Society of Japan 91 (4) 2022/04/15

    Publisher: Physical Society of Japan

    DOI: 10.7566/jpsj.91.045003  

    ISSN: 0031-9015

    eISSN: 1347-4073

  20. Pressure-Induced Superconductivity in Iron-Based Spin-Ladder Compound BaFe2+delta(S1-xSex)(3)

    Hiroki Takahashi, Ryosuke Kikuchi, Chizuru Kawashima, Satoshi Imaizumi, Takuya Aoyama, Kenya Ohgushi

    MATERIALS 15 (4) 2022/02

    DOI: 10.3390/ma15041401  

    eISSN: 1996-1944

  21. Ultrafast magnetization driven by spiral current in Kitaev spin liquid α-RuCl3

    T. Amano, Y. Kawakami, H. Itoh, T. Aoyama, Y. Imai, K. Ohgushi, Y. Nakamura, H. Kishida, K. Yonemitsu, S. Iwai

    The International Conference on Ultrafast Phenomena (UP) 2022 2022

    Publisher: Optica Publishing Group

    DOI: 10.1364/up.2022.tu2a.2  

    More details Close

    In a honeycomb-lattice Mott insulator α-RuCl3, an ultrafast magnetization is induced by circularly polarized excitation of spin-orbit excitons. An ultrafast 6-fs measurement clarifies that the orbital moment emerges from a coherent inter-orbital charge motion.

  22. Zigzag magnetic order in the Kitaev spin-liquid candidate material RuBr3 with a honeycomb lattice

    Yoshinori Imai, Kazuhiro Nawa, Yasuhiro Shimizu, Wakana Yamada, Hideyuki Fujihara, Takuya Aoyama, Ryotaro Takahashi, Daisuke Okuyama, Takamasa Ohashi, Masato Hagihala, Shuki Torii, Daisuke Morikawa, Masami Terauchi, Takayuki Kawamata, Masatsune Kato, Hirotada Gotou, Masayuki Itoh, Taku J. Sato, Kenya Ohgushi

    PHYSICAL REVIEW B 105 (4) 2022/01

    DOI: 10.1103/PhysRevB.105.L041112  

    ISSN: 2469-9950

    eISSN: 2469-9969

  23. Strongly Electron-Correlated Semimetal RuI3 with a Layered Honeycomb Structure

    Kazuhiro Nawa, Yoshinori Imai, Youhei Yamaji, Hideyuki Fujihara, Wakana Yamada, Ryotaro Takahashi, Takumi Hiraoka, Masato Hagihala, Shuki Torii, Takuya Aoyama, Takamasa Ohashi, Yasuhiro Shimizu, Hirotada Gotou, Masayuki Itoh, Kenya Ohgushi, Taku J. Sato

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 90 (12) 2021/12

    DOI: 10.7566/JPSJ.90.123703  

    ISSN: 0031-9015

  24. Dichotomy between orbital and magnetic nematic instabilities in BaFe2S3

    S. Hosoi, T. Aoyama, K. Ishida, Y. Mizukami, K. Hashizume, S. Imaizumi, Y. Imai, K. Ohgushi, Y. Nambu, M. Kimata, S. Kimura, T. Shibauchi

    PHYSICAL REVIEW RESEARCH 2 (4) 2020/11

    DOI: 10.1103/PhysRevResearch.2.043293  

    eISSN: 2643-1564

  25. A j(eff)=1/2 pseudospinon continuum in CaIrO3

    Matteo Rossi, Pietro Marabotti, Yasuyuki Hirata, Giulio Monaco, Michael Krisch, Kenya Ohgushi, Krzysztof Wohlfeld, Jeroen van den Brink, Marco Moretti Sala

    EUROPEAN PHYSICAL JOURNAL PLUS 135 (8) 2020/08

    DOI: 10.1140/epjp/s13360-020-00649-5  

    ISSN: 2190-5444

  26. Mossbauer Study of Rare-earth Ferroborate NdFe3(BO3)(4) Peer-reviewed

    Shin Nakamura, Takatsugu Masuda, Kenya Ohgushi, Takuro Katsufuji

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 89 (8) 084703-084703 2020/08

    DOI: 10.7566/JPSJ.89.084703  

    ISSN: 0031-9015

    eISSN: 1347-4073

  27. Successive magnetic transitions and spin structure in the two-leg ladder compound CsFe2Se3 observed by Cs-133 and Se-77 NMR Peer-reviewed

    Mina Murase, Kaoru Okada, Yoshiaki Kobayashi, Yasuyuki Hirata, Kazuki Hashizume, Takuya Aoyama, Kenya Ohgushi, Masayuki Itoh

    PHYSICAL REVIEW B 102 (1) 2020/07

    DOI: 10.1103/PhysRevB.102.014433  

    ISSN: 2469-9950

    eISSN: 2469-9969

  28. Structural, electrical, magnetic, and optical properties of iron-based ladder compounds BaFe2(S1-xSex)(3) Peer-reviewed

    Satoshi Imaizumi, Takuya Aoyama, Ryota Kimura, Koya Sasaki, Yusuke Nambu, Maxim Avdeev, Yasuyuki Hirata, Yuka Ikemoto, Taro Moriwaki, Yoshinori Imai, Kenya Ohgushi

    PHYSICAL REVIEW B 102 (3) 2020/07

    DOI: 10.1103/PhysRevB.102.035104  

    ISSN: 2469-9950

    eISSN: 2469-9969

  29. High-pressure synthesis of heavily hole-doped cuprates Mg1-xLixCu2O3 with quasi-one-dimensional structure Peer-reviewed

    Yoshinori Imai, Koya Sasaki, Takuya Aoyama, Kenji Shirasaki, Tomoo Yamamura, Kenya Ohgushi

    PHYSICAL REVIEW B 101 (24) 2020/06

    DOI: 10.1103/PhysRevB.101.245112  

    ISSN: 2469-9950

    eISSN: 2469-9969

  30. A Semimetallic State in La3Ir3O11 with the KSbO3 Structure Peer-reviewed

    Takuya Aoyama, Kazutoshi Emi, Chihiro Tabata, Yusuke Nambu, Hironori Nakao, Touru Yamauchi, Kenya Ohgushi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 88 (9) 2019/09

    DOI: 10.7566/JPSJ.88.093706  

    ISSN: 0031-9015

  31. Large Magnon Contributions to Thermal Conductance in Quasi-One-Dimensional Fe-Based Ladder Compounds BaFe2(S1-xSex)(3) Peer-reviewed

    Fei Du, Yutaka Ueda, Kenya Ohgushi

    PHYSICAL REVIEW LETTERS 123 (8) 2019/08

    DOI: 10.1103/PhysRevLett.123.086601  

    ISSN: 0031-9007

    eISSN: 1079-7114

  32. Hydrated lithium intercalation into the Kitaev spin liquid candidate material alpha-RuCl3 Peer-reviewed

    Imai Yoshinori, Konno Katsuya, Hasegawa Yoshinao, Aoyama Takuya, Ohgushi Kenya

    PHYSICAL REVIEW B 99 (24) 2019/06/21

    DOI: 10.1103/PhysRevB.99.245141  

    ISSN: 2469-9950

  33. Polar state induced by block-type lattice distortions in BaFe2Se3 with quasi-one-dimensional ladder structure Peer-reviewed

    Aoyama Takuya, Imaizumi Satoshi, Togashi Takuya, Sato Yoshifumi, Hashizume Kazuki, Nambu Yusuke, Hirata Yasuyuki, Matsubara Masakazu, Ohgushi Kenya

    PHYSICAL REVIEW B 99 (24) 2019/06/19

    DOI: 10.1103/PhysRevB.99.241109  

    ISSN: 2469-9950

    eISSN: 2469-9969

  34. Orbital-anisotropic electronic structure in the nonmagnetic state of BaFe2(As1-x P x )2 superconductors Peer-reviewed

    T. Sonobe, T. Shimojima, A. Nakamura, M. Nakajima, S. Uchida, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, K. Ohgushi, K. Ishizaka

    Scientific Reports 8 (1) 2018/12/01

    DOI: 10.1038/s41598-018-20332-1  

    ISSN: 2045-2322

    eISSN: 2045-2322

  35. Quantum Paramagnet Near Spin‐State Transition Peer-reviewed

    K. Tomiyasu, N. Ito, R. Okazaki, Y. Takahashi, M. Onodera, K. Iwasa, T. Nojima, T. Aoyama, K. Ohgushi, Y. Ishikawa, T. Kamiyama, S. Ishihara

    Adv. Quantum. Technol. 1 1800057 2018/10

  36. Crystal structure determination under high pressure in the iron-based ladder superconductor BaFe2S3 Peer-reviewed

    Kobayashi Kensuke, Maki Sachiko, Murakami Youichi, Hirata Yasuyuki, Ohgushi Kenya, Yamaura Jun-ichi

    SUPERCONDUCTOR SCIENCE & TECHNOLOGY 31 (10) 2018/10

    DOI: 10.1088/1361-6668/aad790  

    ISSN: 0953-2048

    eISSN: 1361-6668

  37. Strong magneto-optical effects in ACr2 O4 (A=Fe, Co) spinel oxides generated by tetrahedrally coordinated transition metal ions Peer-reviewed

    V. Kocsis, S. Bordács, J. Deisenhofer, L. F. Kiss, K. Ohgushi, Y. Kaneko, Y. Tokura, I. Kézsmárki

    Physical Review B 97 (12) 2018/03/23

    DOI: 10.1103/PhysRevB.97.125140  

    ISSN: 2469-9969 2469-9950

  38. Two-phonon Absorption Spectra in the Layered Honeycomb Compound alpha-RuCl3 Peer-reviewed

    Yoshinao Hasegawa, Takuya Aoyama, Koya Sasaki, Yuka Ikemoto, Taro Moriwaki, Toshiya Shirakura, Riichiro Saito, Yoshinori Imai, Kenya Ohgushi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86 (12) 2017/12

    DOI: 10.7566/JPSJ.86.123709  

    ISSN: 0031-9015

  39. Ultrahigh magnetic field phases in the frustrated triangular-lattice magnet CuCrO2 Peer-reviewed

    Atsuhiko Miyata, Oliver Portugall, Daisuke Nakamura, Kenya Ohgushi, Shojiro Takeyama

    PHYSICAL REVIEW B 96 (18) 2017/11

    DOI: 10.1103/PhysRevB.96.180401  

    ISSN: 2469-9950

    eISSN: 2469-9969

  40. Orbital order and fluctuations in the two-leg ladder materials BaFe2X3 (X = S and Se) and CsFe2Se3 Peer-reviewed

    Kou Takubo, Yuichi Yokoyama, Hiroki Wadati, Shun Iwasaki, Takashi Mizokawa, Teak Boyko, Ronny Sutarto, Feizhou He, Kazuki Hashizume, Satoshi Imaizumi, Takuya Aoyama, Yoshinori Imai, Kenya Ohgushi

    PHYSICAL REVIEW B 96 (11) 2017/09

    DOI: 10.1103/PhysRevB.96.115157  

    ISSN: 2469-9950

    eISSN: 2469-9969

  41. Antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors Peer-reviewed

    Takahiro Shimojima, Walid Malaeb, Asuka Nakamura, Takeshi Kondo, Kunihiro Kihou, Chul-Ho Lee, Akira Iyo, Hiroshi Eisaki, Shigeyuki Ishida, Masamichi Nakajima, Shin-ichi Uchida, Kenya Ohgushi, Kyoko Ishizaka, Shik Shin

    SCIENCE ADVANCES 3 (8) 2017/08

    DOI: 10.1126/sciadv.1700466  

    ISSN: 2375-2548

  42. Anisotropic magnetodielectric effect in the honeycomb-type magnet alpha-RuCl3 Peer-reviewed

    Takuya Aoyama, Yoshinao Hasegawa, Shojiro Kimura, Tsuyoshi Kimura, Kenya Ohgushi

    PHYSICAL REVIEW B 95 (24) 245104 2017/06

    DOI: 10.1103/PhysRevB.95.245104  

    ISSN: 2469-9950

    eISSN: 2469-9969

  43. Pressure-Induced Metallization in Iron-Based Ladder Compounds Ba1-xCsxFe2Se3 Peer-reviewed

    Takafumi Hawai, Chizuru Kawashima, Kenya Ohgushi, Kazuyuki Matsubayashi, Yusuke Nambu, Yoshiya Uwatoko, Taku J. Sato, Hiroki Takahashi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86 (2) 024701 2017/02

    DOI: 10.7566/JPSJ.86.024701  

    ISSN: 0031-9015

  44. High-pressure electrical resistivity studies for Ba1-xCsxFe2Se3 Peer-reviewed

    C. Kawashima, H. Soeda, H. Takahashi, T. Hawai, Y. Nambu, T. J. Sato, Y. Hirata, K. Ohgushi

    JOINT AIRAPT-25TH & EHPRG-53RD INTERNATIONAL CONFERENCE ON HIGH PRESSURE SCIENCE AND TECHNOLOGY, 2015 950 042031 2017

    DOI: 10.1088/1742-6596/950/4/042034  

    ISSN: 1742-6588

  45. Magnetic resonances of multiferroic TbFe3(BO3)(4) Peer-reviewed

    David Szaller, Vilmos Kocsis, Sandor Bordacs, Titusz Feher, Toomas Room, Urmas Nagel, Hans Engelkamp, Kenya Ohgushi, Istvan Kezsmarki

    PHYSICAL REVIEW B 95 (2) 2017/01

    DOI: 10.1103/PhysRevB.95.024427  

    ISSN: 2469-9950

    eISSN: 2469-9969

  46. A compact and versatile dynamic flow cryostat for photon science Peer-reviewed

    Peter J. E. M. van der Linden, Marco Moretti Sala, Christian Henriquet, Matteo Rossi, Kenya Ohgushi, Franois Fauth, Laura Simonelli, Carlo Marini, Edmundo Fraga, Claire Murray, Jonathan Potter, Michael Krisch

    REVIEW OF SCIENTIFIC INSTRUMENTS 87 (11) 115103 2016/11

    DOI: 10.1063/1.4966270  

    ISSN: 0034-6748

    eISSN: 1089-7623

  47. Post-perovskite Transition in Anti-structure Peer-reviewed

    Bosen Wang, Kenya Ohgushi

    SCIENTIFIC REPORTS 6 37896 2016/11

    DOI: 10.1038/srep37896  

    ISSN: 2045-2322

  48. Magnetic Precursor of the Pressure-Induced Superconductivity in Fe-Ladder Compounds Peer-reviewed

    Songxue Chi, Yoshiya Uwatoko, Huibo Cao, Yasuyuki Hirata, Kazuki Hashizume, Takuya Aoyama, Kenya Ohgushi

    PHYSICAL REVIEW LETTERS 117 (4) 047003 2016/07

    DOI: 10.1103/PhysRevLett.117.047003  

    ISSN: 0031-9007

    eISSN: 1079-7114

  49. Erratum: Pressure-induced mott transition followed by a 24-K superconducting phase in BaFe2S3 (Physical Review Letters (2015) 115 (246402) DOI 10.1103/PhysRevLett.115.246402) Peer-reviewed

    Touru Yamauchi, Yasuyuki Hirata, Yutaka Ueda, Kenya Ohgushi

    Physical Review Letters 116 2016/04/15

    DOI: 10.1103/PhysRevLett.116.159901  

  50. Crystal field excitations on NdFe3(BO3)(4) investigated by inelastic neutron scattering Peer-reviewed

    S. Hayashida, M. Soda, S. Itoh, T. Yokoo, K. Ohgushi, D. Kawana, T. Masuda

    VI EUROPEAN CONFERENCE ON NEUTRON SCATTERING (ECNS2015) 746 012059 2016

    DOI: 10.1088/1742-6596/746/1/012059  

    ISSN: 1742-6588

  51. Pressure-Induced Mott Transition Followed by a 24-K Superconducting Phase in BaFe2S3 Peer-reviewed

    Touru Yamauchi, Yasuyuki Hirata, Yutaka Ueda, Kenya Ohgushi

    PHYSICAL REVIEW LETTERS 115 (24) 2015/12

    DOI: 10.1103/PhysRevLett.115.246402  

    ISSN: 0031-9007

    eISSN: 1079-7114

  52. Effects of stoichiometry and substitution in quasi-one-dimensional iron chalcogenide BaFe2S3 Peer-reviewed

    Yasuyuki Hirata, Sachiko Maki, Jun-ichi Yamaura, Touru Yamauchi, Kenya Ohgushi

    PHYSICAL REVIEW B 92 (20) 205109 2015/11

    DOI: 10.1103/PhysRevB.92.205109  

    ISSN: 1098-0121

    eISSN: 1550-235X

  53. Pressure-induced superconductivity in the iron-based ladder material BaFe2S3 Peer-reviewed

    Hiroki Takahashi, Akira Sugimoto, Yusuke Nambu, Touru Yamauchi, Yasuyuki Hirata, Takateru Kawakami, Maxim Avdeev, Kazuyuki Matsubayashi, Fei Du, Chizuru Kawashima, Hideto Soeda, Satoshi Nakano, Yoshiya Uwatoko, Yutaka Ueda, Taku J. Sato, Kenya Ohgushi

    NATURE MATERIALS 14 (10) 1008-+ 2015/10

    DOI: 10.1038/NMAT4351  

    ISSN: 1476-1122

    eISSN: 1476-4660

  54. High Pressure Effect on the Superconductivity in VN Peer-reviewed

    Bosen Wang, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Kenya Ohgushi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 84 (10) 104706 2015/10

    DOI: 10.7566/JPSJ.84.104706  

    ISSN: 0031-9015

  55. Magnetic model in multiferroic NdFe3(BO3)(4) investigated by inelastic neutron scattering Peer-reviewed

    S. Hayashida, M. Soda, S. Itoh, T. Yokoo, K. Ohgushi, D. Kawana, H. M. Ronnow, T. Masuda

    PHYSICAL REVIEW B 92 (5) 054402 2015/08

    DOI: 10.1103/PhysRevB.92.054402  

    ISSN: 1098-0121

    eISSN: 1550-235X

  56. Temperature and composition phase diagram in the iron-based ladder compounds Ba1-xCsxFe2Se3 Peer-reviewed

    Takafumi Hawai, Yusuke Nambu, Kenya Ohgushi, Fei Du, Yasuyuki Hirata, Maxim Avdeev, Yoshiya Uwatoko, Yurina Sekine, Hiroshi Fukazawa, Jie Ma, Songxue Chi, Yutaka Ueda, Hideki Yoshizawa, Taku J. Sato

    PHYSICAL REVIEW B 91 (18) 184416-1-184416-11 2015/05

    DOI: 10.1103/PhysRevB.91.184416  

    ISSN: 1098-0121

    eISSN: 1550-235X

  57. Optimum-Doped Superconductivity Associated with Phonon Softening in Vanadium-Based Compounds with Anti-Post-Perovskite Structure Peer-reviewed

    Bosen Wang, Kenya Ohgushi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 84 (4) 044707-1-044707-5 2015/04

    DOI: 10.7566/JPSJ.84.044707  

    ISSN: 0031-9015

  58. Coexistence of localized and itinerant electrons in BaFe2X3 (X = S and Se) revealed by photoemission spectroscopy Peer-reviewed

    D. Ootsuki, N. L. Saini, F. Du, Y. Hirata, K. Ohgushi, Y. Ueda, T. Mizokawa

    PHYSICAL REVIEW B 91 (1) 014505-1-014505-4 2015/01

    DOI: 10.1103/PhysRevB.91.014505  

    ISSN: 1098-0121

    eISSN: 1550-235X

  59. Inelastic neutron scattering on multiferroics NdFe3(BO3)(4) Peer-reviewed

    Shohei Hayashida, Minoru Soda, Shinichi Itoh, Tetsuya Yokoo, Kenya Ohgushi, Daichi Kawana, Takatsugu Masuda

    20TH INTERNATIONAL CONFERENCE ON MAGNETISM, ICM 2015 75 127-133 2015

    DOI: 10.1016/j.phpro.2015.12.018  

    ISSN: 1875-3892

  60. Evidence of a universal relation between electron-mode coupling and T-c in Ba1-xKxFe2As2 superconductor from laser angle-resolved photoemission spectroscopy Peer-reviewed

    W. Malaeb, T. Shimojima, Y. Ishida, T. Kondo, K. Okazaki, Y. Ota, K. Ohgushi, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, S. Ishida, M. Nakajima, S. Uchida, H. Fukazawa, T. Saito, Y. Kohori, S. Shin

    PHYSICAL REVIEW B 90 (19) 195124-1-195124-6 2014/11

    DOI: 10.1103/PhysRevB.90.195124  

    ISSN: 1098-0121

    eISSN: 1550-235X

  61. Doping- and pressure-induced change of electrical and magnetic properties in the Fe-based spin-ladder compound BaFe2Se3 Peer-reviewed

    Fei Du, Yasuyuki Hirata, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Yutaka Ueda, Kenya Ohgushi

    PHYSICAL REVIEW B 90 (8) 085143-1-085143-6 2014/08

    DOI: 10.1103/PhysRevB.90.085143  

    ISSN: 1098-0121

    eISSN: 1550-235X

  62. Magnetoelectric responses from the respective magnetic R and Fe subsystems in the noncentrosymmetric antiferromagnets RFe3(BO3)(4) (R = Eu, Gd, and Tb) Peer-reviewed

    T. Kurumaji, K. Ohgushi, Y. Tokura

    PHYSICAL REVIEW B 89 (19) 195126-1-195126-13 2014/05

    DOI: 10.1103/PhysRevB.89.195126  

    ISSN: 1098-0121

    eISSN: 1550-235X

  63. High-pressure effects in anti-post-perovskite superconductors V(3)PnN(x) (Pn = P, As) Peer-reviewed

    B. S. Wang, J. -G. Cheng, K. Matsubayashi, Y. Uwatoko, K. Ohgushi

    PHYSICAL REVIEW B 89 (14) 144510-1-144510-4 2014/04

    DOI: 10.1103/PhysRevB.89.144510  

    ISSN: 1098-0121

    eISSN: 1550-235X

  64. CaIrO3: A Spin-Orbit Mott Insulator Beyond the j(eff)=1/2 Ground State Peer-reviewed

    M. Moretti Sala, K. Ohgushi, A. Al-Zein, Y. Hirata, G. Monaco, M. Krisch

    PHYSICAL REVIEW LETTERS 112 (17) 176402-1-176402-5 2014/04

    DOI: 10.1103/PhysRevLett.112.176402  

    ISSN: 0031-9007

    eISSN: 1079-7114

  65. Pseudogap formation above the superconducting dome in iron pnictides Peer-reviewed

    T. Shimojima, T. Sonobe, W. Malaeb, K. Shinada, A. Chainani, S. Shin, T. Yoshida, S. Ideta, A. Fujimori, H. Kumigashira, K. Ono, Y. Nakashima, H. Anzai, M. Arita, A. Ino, H. Namatame, M. Taniguchi, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, K. Ohgushi, S. Kasahara, T. Terashima, H. Ikeda, T. Shibauchi, Y. Matsuda, K. Ishizaka

    Physical Review B - Condensed Matter and Materials Physics 89 (4) 2014/01/03

    DOI: 10.1103/PhysRevB.89.045101  

    ISSN: 1098-0121

    eISSN: 1550-235X

  66. Anomalous two peak structure in the Angle-resolved Photoemission Spectra of Ba1-xKxFe2As2 Peer-reviewed

    T. Shimojima, T. Sonobe, W. Malaeb, K. Shinada, A. Chainani, S. Shin, T. Yoshida, S. Ideta, A. Fujimori, H. Kumigashira, K Ono, Y. Nakashima, H. Anzai, M. Arita, A. Ino, H. Namatame, M. Taniguchi, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, K. Ohgushi, S. Kasahara, T. Terashima, H. Ikeda, T. Shibauchi, Y. Matsuda, K. Ishizaka

    Phys. Rev. B 89 045101-1-045101-10 2014/01/03

  67. Control of Bond-Strain-Induced Electronic Phase Transitions in Iron Perovskites Peer-reviewed

    Ikuya Yamada, Hidenobu Etani, Kazuki Tsuchida, Shohei Marukawa, Naoaki Hayashi, Takateru Kawakami, Masaichiro Mizumaki, Kenya Ohgushi, Yoshihiro Kusano, Jungeun Kim, Naruki Tsuji, Ryoji Takahashi, Norimasa Nishiyama, Toru Inoue, Tetsuo Irifune, Mikio Takano

    INORGANIC CHEMISTRY 52 (23) 13751-13761 2013/12

    DOI: 10.1021/ic402344m  

    ISSN: 0020-1669

    eISSN: 1520-510X

  68. Superconductivity in anti-post-perovskite vanadium compounds Peer-reviewed

    Bosen Wang, Kenya Ohgushi

    Scientific Reports 3 3381-1-3381-5 2013/11/29

    DOI: 10.1038/srep03381  

    ISSN: 2045-2322

  69. Hydrostatic pressure (8 GPa) dependence of electrical resistivity of BaCo2As2 single crystal Peer-reviewed

    Chandreyee Ganguli, Kazuyuki Matsubayashi, Kenya Ohgushi, Yoshiya Uwatoko, Moorthi Kanagaraj, Sonachalam Arumugam

    MATERIALS RESEARCH BULLETIN 48 (10) 4329-4331 2013/10

    DOI: 10.1016/j.materresbull.2013.07.003  

    ISSN: 0025-5408

    eISSN: 1873-4227

  70. NMR study of successive magnetic transitions in the A-site ordered perovskite LaMn3Cr4O12 Peer-reviewed

    Yu Kawasaki, Syota Takase, Yutaka Kishimoto, Takashi Ohno, Ikuya Yamada, Kentaro Shiro, Ryoji Takahashi, Kenya Ohgushi, Norimasa Nishiyama, Toru Inoue, Tetsuo Irifune

    JOURNAL OF THE KOREAN PHYSICAL SOCIETY 63 (3) 640-643 2013/08

    DOI: 10.3938/jkps.63.640  

    ISSN: 0374-4884

    eISSN: 1976-8524

  71. Resonant X-ray diffraction study of the strongly spin-orbit-coupled mott insulator CaIrO3 Peer-reviewed

    Kenya Ohgushi, Jun-Ichi Yamaura, Hiroyuki Ohsumi, Kunihisa Sugimoto, Soshi Takeshita, Akihisa Tokuda, Hidenori Takagi, Masaki Takata, Taka-Hisa Arima

    Physical Review Letters 110 (21) 217212-1-217212-5 2013/05/24

    DOI: 10.1103/PhysRevLett.110.217212  

    ISSN: 0031-9007 1079-7114

    eISSN: 1079-7114

  72. Mechanism of enhanced optical second-harmonic generation in the conducting pyrochlore-type Pb2Ir2O7-x oxide compound Peer-reviewed

    Yasuyuki Hirata, Makoto Nakajima, Yusuke Nomura, Hiroyuki Tajima, Yoshitaka Matsushita, Keiko Asoh, Yoko Kiuchi, Adolfo G. Eguiluz, Ryotaro Arita, Tohru Suemoto, Kenya Ohgushi

    Physical Review Letters 110 (18) 187402-1-187402-5 2013/05/03

    DOI: 10.1103/PhysRevLett.110.187402  

    ISSN: 0031-9007 1079-7114

    eISSN: 1079-7114

  73. Suppression of intersite charge transfer in charge-disproportionated perovskite YCu3Fe4O12 Peer-reviewed

    Hidenobu Etani, Ikuya Yamada, Kenya Ohgushi, Naoaki Hayashi, Yoshihiro Kusano, Masaichiro Mizumaki, Jungeun Kim, Naruki Tsuji, Ryoji Takahashi, Norimasa Nishiyama, Toru Inoue, Tetsuo Irifune, Mikio Takano

    Journal of the American Chemical Society 135 (16) 6100-6106 2013/04/24

    DOI: 10.1021/ja312015j  

    ISSN: 0002-7863 1520-5126

  74. Complex orbital state stabilized by strong spin-orbit coupling in a metallic iridium oxide IrO2 Peer-reviewed

    Yasuyuki Hirata, Kenya Ohgushi, Jun-Ichi Yamaura, Hiroyuki Ohsumi, Soshi Takeshita, Masaki Takata, Taka-Hisa Arima

    Physical Review B - Condensed Matter and Materials Physics 87 (16) 161111-1-161111-5 2013/04/15

    DOI: 10.1103/PhysRevB.87.161111  

    ISSN: 1098-0121 1550-235X

    eISSN: 1550-235X

  75. B-site deficiencies in A-site-ordered perovskite LaCu3Pt 3.75O12 Peer-reviewed

    Mikiko Ochi, Ikuya Yamada, Kenya Ohgushi, Yoshihiro Kusano, Masaichiro Mizumaki, Ryoji Takahashi, Shunsuke Yagi, Norimasa Nishiyama, Toru Inoue, Tetsuo Irifune

    Inorganic Chemistry 52 (7) 3985-3989 2013/04/01

    DOI: 10.1021/ic302809v  

    ISSN: 0020-1669

  76. Observation of Phonon-Assisted Magnon Absorption in Spin-Orbit Coupling Induced Mott Insulator Sr2IrO4 Peer-reviewed

    Yasuyuki Hirata, Hiroyuki Tajima, Kenya Ohgushi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 82 (3) 035002-1-035002-2 2013/03

    DOI: 10.7566/JPSJ.82.035002  

    ISSN: 0031-9015

  77. Pd2+-incorporated perovskite CaPd3 B 4O12 (B = Ti, V) Peer-reviewed

    Kentaro Shiro, Ikuya Yamada, Naoya Ikeda, Kenya Ohgushi, Masaichiro Mizumaki, Ryoji Takahashi, Norimasa Nishiyama, Toru Inoue, Tetsuo Irifune

    Inorganic Chemistry 52 (3) 1604-1609 2013/02/04

    DOI: 10.1021/ic3025155  

    ISSN: 0020-1669

  78. Magnetoelasticity in ACr(2)O(4) spinel oxides (A = Mn, Fe, Co, Ni, and Cu) Peer-reviewed

    V. Kocsis, S. Bordacs, D. Varjas, K. Penc, A. Abouelsayed, C. A. Kuntscher, K. Ohgushi, Y. Tokura, I. Kezsmarki

    PHYSICAL REVIEW B 87 (6) 064416-1-064416-9 2013/02

    DOI: 10.1103/PhysRevB.87.064416  

    ISSN: 1098-0121

  79. Abrupt change in the energy gap of superconducting Ba1-xKxFe2As2 single crystals with hole doping Peer-reviewed

    W. Malaeb, T. Shimojima, Y. Ishida, K. Okazaki, Y. Ota, K. Ohgushi, K. Kihou, T. Saito, C. H. Lee, S. Ishida, M. Nakajima, S. Uchida, H. Fukazawa, Y. Kohori, A. Iyo, H. Eisaki, C. -T. Chen, S. Watanabe, H. Ikeda, S. Shin

    PHYSICAL REVIEW B 86 (16) 165117-1-165117-7 2012/10

    DOI: 10.1103/PhysRevB.86.165117  

    ISSN: 1098-0121

  80. Tetrahedral Magnetic Order and the Metal-Insulator Transition in the Pyrochlore Lattice of Cd2Os2O7 Peer-reviewed

    J. Yamaura, K. Ohgushi, H. Ohsumi, T. Hasegawa, I. Yamauchi, K. Sugimoto, S. Takeshita, A. Tokuda, M. Takata, M. Udagawa, M. Takigawa, H. Harima, T. Arima, Z. Hiroi

    PHYSICAL REVIEW LETTERS 108 (24) 247205-1-247205-5 2012/06

    DOI: 10.1103/PhysRevLett.108.247205  

    ISSN: 0031-9007

    eISSN: 1079-7114

  81. Stripelike magnetism in a mixed-valence insulating state of the Fe-based ladder compound CsFe2Se3 Peer-reviewed

    Fei Du, Kenya Ohgushi, Yusuke Nambu, Takateru Kawakami, Maxim Avdeev, Yasuyuki Hirata, Yoshitaka Watanabe, Taku J. Sato, Yutaka Ueda

    PHYSICAL REVIEW B 85 (21) 214436-1-214436-5 2012/06

    DOI: 10.1103/PhysRevB.85.214436  

    ISSN: 1098-0121

  82. In situ observation of shear stress-induced perovskite to post-perovskite phase transition in CaIrO3 and the development of its deformation texture in a diamond-anvil cell up to 30 GPa Peer-reviewed

    Ken Niwa, Nobuyoshi Miyajima, Yusuke Seto, Kenya Ohgushi, Hirotada Gotou, Takehiko Yagi

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 194 10-17 2012/03

    DOI: 10.1016/j.pepi.2012.01.007  

    ISSN: 0031-9201

  83. Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe <inf>2</inf>Se <inf>3</inf> Peer-reviewed

    Yusuke Nambu, Kenya Ohgushi, Shunpei Suzuki, Fei Du, Maxim Avdeev, Yoshiya Uwatoko, Koji Munakata, Hiroshi Fukazawa, Songxue Chi, Yutaka Ueda, Taku J. Sato

    Physical Review B - Condensed Matter and Materials Physics 85 (6) 064413-1-064413-5 2012/02/22

    DOI: 10.1103/PhysRevB.85.064413  

    ISSN: 1098-0121

    eISSN: 1550-235X

  84. Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3

    Yusuke Nambu, Kenya Ohgushi, Shunpei Suzuki, Fei Du, Maxim Avdeev, Yoshiya Uwatoko, Koji Munakata, Hiroshi Fukazawa, Songxue Chi, Yutaka Ueda, Taku J. Sato

    PHYSICAL REVIEW B 85 (6) 2012/02

    DOI: 10.1103/PhysRevB.85.064413  

    ISSN: 2469-9950

    eISSN: 2469-9969

  85. Doping dependence of Hall coefficient and evolution of coherent electronic state in the normal state of the Fe-based superconductor Ba1-xKxFe2As2 Peer-reviewed

    Kenya Ohgushi, Yoko Kiuchi

    PHYSICAL REVIEW B 85 (6) 064522-1-064522-5 2012/02

    DOI: 10.1103/PhysRevB.85.064522  

    ISSN: 1098-0121

  86. Phase transition and magnetic structure of pyrochlore oxide Cd2Os2O7 Peer-reviewed

    J. Yamaura, H. Ohsumi, K. Sugimoto, S. Tsutsui, Y. Yoda, S. Takeshita, A. Tokuda, S. Kitao, M. Kurokuzu, M. Seto, I. Yamauchi, K. Ohgushi, M. Takigawa, T. Arima, Z. Hiroi

    INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2011) 391 012112-1-012112-4 2012

    DOI: 10.1088/1742-6596/391/1/012112  

    ISSN: 1742-6588

  87. Pressure-induced changes in the magnetic and valence state of EuFe2As2 Peer-reviewed

    K. Matsubayashi, K. Munakata, M. Isobe, N. Katayama, K. Ohgushi, Y. Ueda, N. Kawamura, M. Mizumaki, N. Ishimatsu, M. Hedo, I. Umehara, Y. Uwatoko

    PHYSICAL REVIEW B 84 (2) 024502-1-024502-6 2011/07

    DOI: 10.1103/PhysRevB.84.024502  

    ISSN: 1098-0121

    eISSN: 1550-235X

  88. Orbital-Independent Superconducting Gaps in Iron Pnictides Peer-reviewed

    T. Shimojima, F. Sakaguchi, K. Ishizaka, Y. Ishida, T. Kiss, M. Okawa, T. Togashi, C. -T. Chen, S. Watanabe, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, K. Ohgushi, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda, A. Chainani, S. Shin

    SCIENCE 332 (6029) 564-567 2011/04

    DOI: 10.1126/science.1202150  

    ISSN: 0036-8075

    eISSN: 1095-9203

  89. Structural and electronic properties of pyrochlore-type A(2)Re(2)O(7) (A = Ca, Cd, and Pb) Peer-reviewed

    Kenya Ohgushi, Jun-ichi Yamaura, Masaki Ichihara, Yoko Kiuchi, Takashi Tayama, Toshiro Sakakibara, Hirotada Gotou, Takehiko Yagi, Yutaka Ueda

    PHYSICAL REVIEW B 83 (12) 125103-1-125103-6 2011/03

    DOI: 10.1103/PhysRevB.83.125103  

    ISSN: 1098-0121

  90. Giant Negative Thermal Expansion in a Novel Iron Perovskite SrCu3Fe4O12 Peer-reviewed

    Yamada, I, K. Tsuchida, K. Ohgushi, N. Hayashi, J. Kim, N. Tsuji, R. Takahashi, M. Matsushita, N. Nishiyama, T. Inoue, T. Irifune, K. Kato, M. Takata, M. Takano

    Angew. Chem. Int. Ed. 123 6709-6712 2011

    DOI: 10.1002/anie.201102228  

  91. Elasticity of CaIrO3 with perovskite and post-perovskite structure Peer-reviewed

    Ken Niwa, Takehiko Yagi, Kenya Ohgushi

    PHYSICS AND CHEMISTRY OF MINERALS 38 (1) 21-31 2011/01

    DOI: 10.1007/s00269-010-0378-z  

    ISSN: 0342-1791

  92. Superconducting Phase at 7.7 K in the HgxReO3 Compound with a Hexagonal Bronze Structure Peer-reviewed

    Kenya Ohgushi, Ayako Yamamoto, Yoko Kiuchi, Chandreyee Ganguli, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Hidenori Takagi

    PHYSICAL REVIEW LETTERS 106 (1) 017001-1-017001-4 2011/01

    DOI: 10.1103/PhysRevLett.106.017001  

    ISSN: 0031-9007

  93. Giant Negative Thermal Expansion in the Iron Perovskite SrCu3Fe4O12 Peer-reviewed

    Ikuya Yamada, Kazuki Tsuchida, Kenya Ohgushi, Naoaki Hayashi, Jungeun Kim, Naruki Tsuji, Ryoji Takahashi, Masafumi Matsushita, Norimasa Nishiyama, Toru Inoue, Tetsuo Irifune, Kenichi Kato, Masaki Takata, Mikio Takano

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 50 (29) 6579-6582 2011

    DOI: 10.1002/anie.201102228  

    ISSN: 1433-7851

  94. Transition from antiferromagnetism to superconductivity in the compensated metallic state of Ba1-xKx(Fe1-yCoy)(2)As-2 Peer-reviewed

    Shunpei Suzuki, Kenya Ohgushi, Yoko Kiuchi, Yutaka Ueda

    PHYSICAL REVIEW B 82 (18) 184510-1-184510-5 2010/11

    DOI: 10.1103/PhysRevB.82.184510  

    ISSN: 1098-0121

  95. CaCu3Pt4O12: The First Perovskite with the B Site Fully Occupied by Pt4+ Peer-reviewed

    Ikuya Yamada, Yuka Takahashi, Kenya Ohgushi, Norimasa Nishiyama, Ryoji Takahashi, Kohei Wada, Takehiro Kunimoto, Hiroaki Ohfuji, Yohei Kojima, Toru Inoue, Tetsuo Irifune

    INORGANIC CHEMISTRY 49 (15) 6778-6780 2010/08

    DOI: 10.1021/ic100474x  

    ISSN: 0020-1669

  96. High-Field Studies on Single Crystals of EuFe2As2 Peer-reviewed

    M. Tokunaga, I. Katakura, N. Katayama, K. Ohgushi

    JOURNAL OF LOW TEMPERATURE PHYSICS 159 (5-6) 601-605 2010/06

    DOI: 10.1007/s10909-010-0169-4  

    ISSN: 0022-2291

  97. Experimental band structure of the nearly half-metallic CuCr2Se4: an optical and magneto-optical study Peer-reviewed

    S. Bordacs, I. Kezsmarki, K. Ohgushi, Y. Tokura

    NEW JOURNAL OF PHYSICS 12 053039-1-053039-10 2010/05

    DOI: 10.1088/1367-2630/12/5/053039  

    ISSN: 1367-2630

  98. Magnetic phase diagrams of the multicritical olivine Mn2SiS4 and Mn2GeS4 Peer-reviewed

    J. -H. Chung, K. Ohgushi, Y. Ueda

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 322 (7) 832-837 2010/04

    DOI: 10.1016/j.jmmm.2009.11.013  

    ISSN: 0304-8853

  99. Orbital-Dependent Modifications of Electronic Structure across the Magnetostructural Transition in BaFe2As2 Peer-reviewed

    T. Shimojima, K. Ishizaka, Y. Ishida, N. Katayama, K. Ohgushi, T. Kiss, M. Okawa, T. Togashi, X. -Y. Wang, C. -T. Chen, S. Watanabe, R. Kadota, T. Oguchi, A. Chainani, S. Shin

    PHYSICAL REVIEW LETTERS 104 (5) 057002-1-057002-4 2010/02

    DOI: 10.1103/PhysRevLett.104.057002  

    ISSN: 0031-9007

  100. Deformation microtextures in CaIrO3 post-perovskite under high stress conditions using a laser-heated diamond anvil cell Peer-reviewed

    N. Miyajima, K. Niwa, F. Heidelbach, T. Yagi, K. Ohgushi

    INTERNATIONAL CONFERENCE ON HIGH PRESSURE SCIENCE AND TECHNOLOGY, JOINT AIRAPT-22 AND HPCJ-50 215 012097-1-012097-6 2010

    DOI: 10.1088/1742-6596/215/1/012097  

    ISSN: 1742-6588

  101. High-Pressure Ac Specific Heat Technique with Cubic Anvil Apparatus Peer-reviewed

    K. Matsubayashi, M. Hedo, I. Umehara, N. Katayama, K. Ohgushi, A. Yamada, K. Munakata, T. Matsumoto, Y. Uwatoko

    INTERNATIONAL CONFERENCE ON HIGH PRESSURE SCIENCE AND TECHNOLOGY, JOINT AIRAPT-22 AND HPCJ-50 215 012187-1-012187-4 2010

    DOI: 10.1088/1742-6596/215/1/012187  

    ISSN: 1742-6588

  102. Variation in Electronic State of Ba(Fe1-xCox)(2)AS(2) Alloy as Investigated in Terms of Transport Properties Peer-reviewed

    Naoyuki Katayama, Yoko Kiuchi, Yoshitaka Matsushita, Kenya Ohgushi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 78 (12) 123702-1-123702-4 2009/12

    DOI: 10.1143/JPSJ.78.123702  

    ISSN: 0031-9015

  103. Spontaneous Formation of a Superconducting and Antiferromagnetic Hybrid State in SrFe2As2 under High Pressure Peer-reviewed

    K. Kitagawa, N. Katayama, H. Gotou, T. Yagi, K. Ohgushi, T. Matsumoto, Y. Uwatoko, M. Takigawa

    PHYSICAL REVIEW LETTERS 103 (25) 257002-1-257002-4 2009/12

    DOI: 10.1103/PhysRevLett.103.257002  

    ISSN: 0031-9007

    eISSN: 1079-7114

  104. Metallization of quasi-two-dimensional Mott insulator CaIrO3 with S=1/2 spins Peer-reviewed

    K. Ohgushi, T. Yagi, H. Gotou, Y. Kiuchi, Y. Ueda

    PHYSICA B-CONDENSED MATTER 404 (19) 3261-3263 2009/10

    DOI: 10.1016/j.physb.2009.07.084  

    ISSN: 0921-4526

  105. Magnetic-Order-Induced Crystal Symmetry Lowering in ACr(2)O(4) Ferrimagnetic Spinels Peer-reviewed

    S. Bordacs, D. Varjas, I. Kezsmarki, G. Mihaly, L. Baldassarre, A. Abouelsayed, C. A. Kuntscher, K. Ohgushi, Y. Tokura

    PHYSICAL REVIEW LETTERS 103 (7) 077205-1-077205-4 2009/08

    DOI: 10.1103/PhysRevLett.103.077205  

    ISSN: 0031-9007

  106. Intrinsic Properties of AFe(2)As(2) (A = Ba, Sr) Single Crystal under Highly Hydrostatic Pressure Conditions Peer-reviewed

    Kazuyuki Matsubayashi, Naoyuki Katayama, Kenya Ohgushi, Atsushi Yamada, Koji Munakata, Takehiko Matsumoto, Yoshiya Uwatoko

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 78 (7) 073706-1-073706-4 2009/07

    DOI: 10.1143/JPSJ.78.073706  

    ISSN: 0031-9015

  107. Antiferromagnetism of SrFe2As2 Studied by Single-Crystal As-75-NMR Peer-reviewed

    Kentaro Kitagawa, Naoyuki Katayama, Kenya Ohgushi, Masashi Takigawa

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 78 (6) 063706-1-063706-4 2009/06

    DOI: 10.1143/JPSJ.78.063706  

    ISSN: 0031-9015

  108. Resonant x-ray magnetoelectric effect in a centrosymmetric spinel oxide Peer-reviewed

    M. Matsubara, Y. Shimada, K. Ohgushi, T. Arima, Y. Tokura

    PHYSICAL REVIEW B 79 (18) 180407(R) -1-180407(R) -4 2009/05

    DOI: 10.1103/PhysRevB.79.180407  

    ISSN: 1098-0121

  109. Study of electronic states of a pyrochlore-type molybdate (Sm2Mo2O7) at low temperature by means of hard x-ray photoemission spectroscopy Peer-reviewed

    A. Higashiya, S. Imada, H. Fujiwara, A. Sekiyama, S. Suga, A. Yamasaki, Y. Taguchi, M. Iwama, K. Ohgushi, Y. Tokura, T. Ishikawa

    25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4 150 042055-1-042055-4 2009

    DOI: 10.1088/1742-6596/150/4/042055  

    ISSN: 1742-6588

  110. Commensurate Itinerant Antiferromagnetism in BaFe(2)AS(2): As-75-NMR Studies on a Self-Flux Grown Single Crystal Peer-reviewed

    Kentaro Kitagawa, Naoyuki Katayama, Kenya Ohgushi, Makoto Yoshida, Masashi Takigawa

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 77 (11) 114709-1-114709-6 2008/11

    DOI: 10.1143/JPSJ.77.114709  

    ISSN: 0031-9015

  111. Magnetoelectric control of spin-chiral ferroelectric domains in a triangular lattice antiferromagnet Peer-reviewed

    Kenta Kimura, Hiroyuki Nakamura, Kenya Ohgushi, Tsuyoshi Kimura

    PHYSICAL REVIEW B 78 (14) 140401(R)-1-140401(R)-4 2008/10

    DOI: 10.1103/PhysRevB.78.140401  

    ISSN: 1098-0121

  112. CaPtO3 as a novel post-perovskite oxide Peer-reviewed

    Kenya Ohgushi, Yoshitaka Matsushita, Nobuyoshi Miyajima, Yoshio Katsuya, Masahiko Tanaka, Fujio Izumi, Hirotada Gotou, Yutaka Ueda, Takehiko Yagi

    PHYSICS AND CHEMISTRY OF MINERALS 35 (4) 189-195 2008/05

    DOI: 10.1007/s00269-007-0211-5  

    ISSN: 0342-1791

    eISSN: 1432-2021

  113. Generation of electric polarization with rotating magnetic field in helimagnet ZnCr2Se4 Peer-reviewed

    Hiroshi Murakawa, Yoshinori Onose, Kenya Ohgushi, Shintaro Ishiwata, Yoshinori Tokura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 77 (4) 043709-1-043709-4 2008/04

    DOI: 10.1143/JPSJ.77.043709  

    ISSN: 0031-9015

  114. Magnetic, optical, and magnetooptical properties of spinel-type ACr(2)X(4) (A = Mn, Fe, Co, Cu, Zn, Cd; X = O, S, Se) Peer-reviewed

    Kenya Ohgushi, Yoichi Okimoto, Takeshi Ogasawara, Shigeki Miyasaka, Yoshinori Tokura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 77 (3) 034713-1-034713-16 2008/03

    DOI: 10.1143/JPSJ.77.034713  

    ISSN: 0031-9015

  115. Lattice preferred orientation in CaIrO3 perovskite and post-perovskite formed by plastic deformation under pressure Peer-reviewed

    Ken Niwa, Takehiko Yagi, Kenya Ohgushi, Sebastien Merkel, Nobuyoshi Miyajima, Takumi Kikegawa

    PHYSICS AND CHEMISTRY OF MINERALS 34 (9) 679-686 2007/11

    DOI: 10.1007/s00269-007-0182-6  

    ISSN: 0342-1791

    eISSN: 1432-2021

  116. Ca1-xNaxIrO3 as a novel quasi-two-dimensional Mott transition system Peer-reviewed

    Kenya Ohgushi, Hirotada Gotou, Takehiko Yagi, Yoko Kiuchi, Fumiko Sakai, Yutaka Ueda

    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 460 534-535 2007/09

    DOI: 10.1016/j.physc.2007.03.133  

    ISSN: 0921-4534

  117. Electron correlation and the metal-insulator transition of the pyrochlore molybdates R2Mo2O7 (R=Nd, Sm, Gd, Tb, Y) Peer-reviewed

    A. Higashiya, S. Imada, A. Yamasaki, A. Irizawa, A. Sekiyama, S. Suga, Y. Taguchi, M. Iwama, K. Ohgushi, Y. Tokura

    PHYSICAL REVIEW B 75 (15) 155106-1-155106-7 2007/04

    DOI: 10.1103/PhysRevB.75.155106  

    ISSN: 1098-0121

  118. Spin-flop multicritical phenomena in Mn(2)AS(4)(A = Si and Ge) Peer-reviewed

    K. Ohgushi, Y. Ueda

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 310 (2) 1291-1292 2007/03

    DOI: 10.1016/j.jmmm.2006.10.443  

    ISSN: 0304-8853

  119. Spin-lattice coupling in ferroelectric spiral magnets: Comparison between the cases of (Tb,Dy)MnO3 and CoCr2O4 Peer-reviewed

    Taka-hisa Arima, Yuichi Yamasaki, Takeshi Goto, Satoshi Iguchi, Kenya Ohgushi, Shigeki Miyasaka, Yoshinori Tokura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 76 (2) 023602-1-023602-4 2007/02

    DOI: 10.1143/JPSJ.76.023602  

    ISSN: 0031-9015

  120. Metal-insulator transition in Ca(1-x)Na(x)IrO(3) with post-perovskite structure Peer-reviewed

    K. Ohgushi, H. Gotou, T. Yagi, Y. Kiuchi, F. Sakai, Y. Ueda

    PHYSICAL REVIEW B 74 (24) 241104(R)-1-241104(R)-4 2006/12

    DOI: 10.1103/PhysRevB.74.241104  

    ISSN: 1098-0121

  121. Photoinduced dynamics of sublattice magnetization in ferrimagnets: FeCr2S4 and CoCr2S4 Peer-reviewed

    Takeshi Ogasawara, Kenya Ohgushi, Hiroshi Okamoto, Yoshinori Tokura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 75 (8) 083707-1-083707-4 2006/08

    DOI: 10.1143/JPSJ.75.083707  

    ISSN: 0031-9015

  122. Crystal morphology and dislocation microstructures of CaIrO3: A TEM study of an analogue of the MgSiO3 post-perovskite phase Peer-reviewed

    Nobuyoshi Miyajima, Kenya Ohgushi, Masaki Ichihara, Takehiko Yagi

    GEOPHYSICAL RESEARCH LETTERS 33 (12) L12302-1-L12302-4 2006/06

    DOI: 10.1029/2005GL025001  

    ISSN: 0094-8276

    eISSN: 1944-8007

  123. High-pressure synthesis and magnetic properties of orthorhombic CuRh2O4 Peer-reviewed

    K Ohgushi, H Gotou, T Yagi, Y Ueda

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 75 (2) 023707-1-023707-3 2006/02

    DOI: 10.1143/JPSJ.75.023707  

    ISSN: 0031-9015

  124. Anisotropic anomalous Hall effect of topological origin in carrier-doped FeCr2S4 Peer-reviewed

    K Ohgushi, S Miyasaka, Y Tokura

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 75 (1) 013710-1-013710-4 2006/01

    DOI: 10.1143/JPSJ.75.013710  

    ISSN: 0031-9015

  125. Anomalous magnetic properties of Fe2GeS4 and Mn2SiS4 Peer-reviewed

    K. Ohgushi, Y. Ueda

    LOW TEMPERATURE PHYSICS, PTS A AND B 850 1277-+ 2006

    DOI: 10.1063/1.2355172  

    ISSN: 0094-243X

  126. Anomalous magnetic properties near the spin-flop bicritical point in Mn(2)AS(4) (A=Si and Ge) Peer-reviewed

    K Ohgushi, Y Ueda

    PHYSICAL REVIEW LETTERS 95 (21) 217202-1-217202-4 2005/11

    DOI: 10.1103/PhysRevLett.95.217202  

    ISSN: 0031-9007

  127. Gigantic Kerr rotation induced by a d-d transition resonance in MCr2S4 (M = Mn, Fe) Peer-reviewed

    K Ohgushi, T Ogasawara, Y Okimoto, S Miyasaka, Y Tokura

    PHYSICAL REVIEW B 72 (15) 155114-1-155114-5 2005/10

    DOI: 10.1103/PhysRevB.72.155114  

    ISSN: 1098-0121

  128. Ferromagnetic metal to spin-glass insulator transition in pyrochlore-type molybdates R2Mo2O7 studied with photoemission and XMCD Peer-reviewed

    S Imada, A Higashiya, M Okazaki, M Kashida, A Sekiyama, Y Taguchi, M Iwama, K Ogusi, Y Tokura, S Suga

    JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA 144 711-713 2005/06

    DOI: 10.1016/j.elspec.2005.01.127  

    ISSN: 0368-2048

  129. General features of photoinduced spin dynamics in ferromagnetic and ferrimagnetic compounds Peer-reviewed

    T Ogasawara, K Ohgushi, Y Tomioka, KS Takahashi, H Okamoto, M Kawasaki, Y Tokura

    PHYSICAL REVIEW LETTERS 94 (8) 087202-1-087202-4 2005/03

    DOI: 10.1103/PhysRevLett.087202  

    ISSN: 0031-9007

    eISSN: 1079-7114

  130. The spin chirality induced anomalous Hall effect in pyrochlore ferromagnets Peer-reviewed

    Y Taguchi, Y Oohara, H Yoshizawa, N Nagaosa, T Sasaki, S Awaji, Y Iwasa, T Tayama, T Sakakibara, S Iguchi, K Ohgushi, T Ito, Y Tokura

    JOURNAL OF PHYSICS-CONDENSED MATTER 16 (11) S599-S606 2004/03

    DOI: 10.1088/0953-8984/16/005  

    ISSN: 0953-8984

  131. Optical probe of the metal-insulator transition in pyrochlore-type molybdate Peer-reviewed

    Y. Taguchi, K. Ohgushi, Y. Tokura

    Physical Review B - Condensed Matter and Materials Physics 65 (11) 1-5 2002

    DOI: 10.1103/PhysRevB.65.115102  

    ISSN: 1550-235X 1098-0121

  132. Spin anisotropy and quantum Hall effect in the kagomé lattice: Chiral spin state based on a ferromagnet Peer-reviewed

    K. Ohgushi, S. Murakami, N. Nagaosa

    Physical Review B - Condensed Matter and Materials Physics 62 (10) R6065-R6068 2000/09/01

    DOI: 10.1103/PhysRevB.62.R6065  

    ISSN: 0163-1829

  133. Spin anisotropy and quantum Hall effect in the kagome lattice: Chiral spin state based on a ferromagnet Peer-reviewed

    K Ohgushi, S Murakami, N Nagaosa

    PHYSICAL REVIEW B 62 (10) R6065-R6068 2000/09

    DOI: 10.1103/PhysRevB.62.R6065  

    ISSN: 1098-0121

    eISSN: 1550-235X

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Books and Other Publications 16

  1. 時間反転対称性の破れた反強磁性体におけるピエゾ磁気効果

    青山拓也, 小室源, 大串研也

    高圧力の科学と技術 2024/04

  2. 梯子型鉄系化合物BaFe2(S1-xSex)3におけるネマティック秩序

    青山拓也, 大串研也

    2023/05

  3. コタイ ブツリ 〈 キタエフスピン エキタイ ノ シン テンカイ 〉 トクシュウゴウ ; シン ブッシツ カイハツ

    2022/11

  4. 空間反転対称性の破れた量子液晶の探索

    大串 研也, 木村 剛

    2021/07

  5. BaMn2As2における磁気四極子秩序

    大串研也, 江見知俊

    2020

  6. 梯子型鉄系化合物BaFe2S3における圧力誘起超伝導

    山内 徹, 高橋 博樹, 南部 雄亮, 佐藤 卓, 平田 靖透, 大串 研也

    アグネ技術センター 2019/01

  7. 梯子型鉄系超伝導体の元素置換効果

    大串 研也, 平田 靖透, 山内 徹

    2019/01

  8. 固体の量子伝導の理解に向けて

    大串 研也

    2017/02

  9. 遷移金属化合物における強相関電子物性

    大串 研也

    2015/11

    DOI: 10.14989/204769  

  10. 新しいバナジウム系超伝導体の発見

    大串 研也

    2015/04/20

  11. アンチポストペロブスカイト構造を有する超伝導体の発見

    大串 研也

    2014/08/05

  12. ポストペロブスカイト型化合物CaIrO3の磁気構造

    大串 研也, 大隅 寛幸, 山浦 淳一, 有馬 孝尚

    The Crystallographic Society of Japan 2014/03/05

    DOI: 10.5940/jcrsj.56.36  

    More details Close

    We have performed resonant X-ray diffraction experiments at the Ir L absorption edges for a post-perovskite compound CaIrO3 with a Ir4+:(t2g5 electronic configuration. By observing the magnetic signals, we could clearly see that the magnetic structure was a striped ordering with antiferromagnetic moments along the c axis and that the wave function of a t2g hole is strongly spin-orbit entangled, the Jeff=1/2 state. The observed spin arrangement is consistent with a theoretical work predicting a unique superexchange interaction called the quantum compass model. Our studies stimulate further studies for developing novel quantum states in iridium oxides.

  13. 5d遷移金属パイロクロア酸化物における低温磁気構造の研究

    山浦 淳一, 大串 研也, 広井 善二

    The Crystallographic Society of Japan 2013/05/01

    DOI: 10.5940/jcrsj.55.116  

    More details Close

    Cd2Os2O7 shows a metal-insulator transition at 227 K with magnetic ordering in an undistorted pyrochlore lattice, but its magnetic structure and the origin of the transition are not yet uncovered. We observed commensurate magnetic peaks by resonant X-ray scattering experiments on a high-quality single crystal. A noncollinear all-in/all-out spin arrangement on the Os tetrahedra is proposed on the bases of the experimental results and the irreducible representation analysis.

  14. ポストペロブスカイトの物性科学

    大串研也

    2011

  15. Exploratory synthesis and characterization of post-perovskite oxide

    Kenya Ohgushi

    2008

    DOI: 10.4131/jshpreview.18.237  

  16. フラストレーションのある強磁性体における異常ホール効果

    村上 修一, 大串 研也, 永長 直人

    2000

Show all Show first 5

Research Projects 1

  1. Exploring quantum emergence through correlation design science

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Transformative Research Areas (A)

    Institution: The University of Tokyo

    2025/04/01 - 2030/03/31

Social Activities 3

  1. バナジウム・リン・窒素化合物、4.2Kで超電導状態に

    2013/12/03 -

  2. 新構造の超電導物質 地球最深部の固体まねる

    2013/12/03 -

  3. 東大など、「コンパス型」相互作用解明-イリジウム酸化物の磁気構造

    2013/05/27 -