Rchr
J-GLOBAL ID:200901023396884184
Update date: Apr. 16, 2024
Fujiyama Shigeki
フジヤマ シゲキ | Fujiyama Shigeki
Affiliation and department:
Job title:
Senior Resarcher
Research field (1):
Magnetism, superconductivity, and strongly correlated systems
Research keywords (35):
有機導体
, 強相関電子系
, 共鳴磁気X線散乱
, 核磁気共鳴
, 磁性
, スピン液体
, フラストレーション
, 磁場誘起超伝導
, 量子現象
, スピン軌道相互作用
, スピンアイス
, 負の熱膨張
, 異常ホール効果
, 中性子散乱
, NMR
, ESR
, 金属・絶縁体転移
, モット転移
, BEDT-TTF
, 軌道自由度
, 電荷自由度
, 中性-イオン性転移
, 電荷秩序
, 赤外・ラマン
, 高圧力
, 格子自由度
, モット絶縁体
, 分子導体
, 磁気共鳴NMR
, ゼロギャップ伝導体
, Moessbauer効果 磁性
, 磁気緩和
, 磁気共鳴
, and relaxations mossbeuer effects Magnetic properties and materials
, Magnetic resonances
Research theme for competitive and other funds (16):
- 2024 - 2027 分子性ディラック電子の軌道電流相関効果と不純物効果
- 2021 - 2024 Theory and verification of electromagnetic duality in Dirac electron systems
- 2020 - 2023 多軌道モット有機導体の作る新電子相とスピン輸送
- 2014 - 2018 Unconventional electronic states in Nickel dithiolate componds
- 2007 - 2011 Geometrical frustration and functions in spin-charge-lattice coupled system
- 2008 - 2009 圧力・不純物量で制御された量子スピン液体の安定性の研究
- 2008 - 2009 三次元カゴメ格子の磁気励起と軌道液体状態の探索
- 2007 - 2008 Unconventional electronic state near field induced superconductivity
- 2003 - 2007 磁気共鳴による高圧力下分子性物質新機能の探索
- 2003 - 2007 分子導体における電荷の局在性と遍歴性の研究
- 2005 - 2006 磁場差起超伝導を示す有機導体における磁気相関の微視的研究
- 2001 - 2003 Investigation of the electronic states in the successive SDW transitions of one-dimensional organic conductors
- 1999 - 2001 NMRによる遍歴-局在複合スピン系の微視的研究:新電子相の開拓
- 1998 - 2000 NMR法を用いた高温超伝導体におけるスピン拡散
- 遷移金属酸化物の磁気的研究
- Magnetic properties of transition metal oxides
Show all
Papers (34):
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K. Ueda, S. Fujiyama, R. Kato. Quantum phase transition of an organic spin liquid tuned by mixing counterions. Physical Review B. 2024. 109. 14
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T. Kobayashi, Y. Kato, H. Taniguchi, T. Tsumuraya, K. Hiraki, S. Fujiyama. Role of hydrogen bonding in charge-ordered organic conductor α-(BEDT-TTF)2I3 probed by 127I nuclear quadrupole resonance. Physical Review B. 2023. 108. 11
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Reizo Kato, Masashi Uebe, Shigeki Fujiyama, Hengbo Cui. A Discrepancy in Thermal Conductivity Measurement Data of Quantum Spin Liquid β′-EtMe3Sb[Pd(dmit)2]2 (dmit = 1,3-Dithiol-2-thione-4,5-dithiolate). Crystals. 2022. 12. 1. 102-102
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S. Fujiyama, H. Maebashi, N. Tajima, T. Tsumuraya, H-B. Cui, M. Ogata, R. Kato. Large Diamagnetism and Electromagnetic Duality in Two-Dimensional Dirac Electron System. Physical Review Letters. 2022. 128. 2
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Takuya Kobayashi, Y. Kato, Hiromi Taniguchi, Takao Tsumuraya, Ko-ichi Hiraki, Shigeki Fujiyama. Absence of hydrogen bonding in charge-ordered organic conductor $α$-(BEDT-TTF)$_2$I$_3$ probed by $^{127}$I-NQR. 2022
more...
MISC (33):
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伊藤篤史, 加藤優樹, 小林拓矢, 小林拓矢, 谷口弘三, 圓谷貴夫, 藤山茂樹. 127I-NQR study of organic superconductor β-(BEDT-TTF)2I3. 日本物理学会講演概要集(CD-ROM). 2022. 77. 1
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藤山茂樹, 前橋英明, CUI H-B., 圓谷貴夫, 小形正男, 加藤礼三. Orbital magnetism of α-(BETS)2I3. 日本物理学会講演概要集(CD-ROM). 2020. 75. 2
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Fujiyama S, Niitaka S, Sugimoto K, Kuriyama H, Matsuno J, Ohsumi H, Arima T, Takagi H. 25pXP-12 Magnetic structure of thin film Ir_2O_4. Meeting abstracts of the Physical Society of Japan. 2010. 65. 2. 608-608
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Fujiyama S., Ohashi K., Ohsumi H., Arima T., Takagi H. 22pGE-11 Spin structure of Sr_3Ir_2O_7 observed by resonant magnetic X-ray diffraction. Meeting abstracts of the Physical Society of Japan. 2010. 65. 1. 655-655
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Fujiyama S, Niitaka S, Sugimoto K, Ohsumi H, Takeshita S, Arima T, Takagi H. 25pXP-11 Magnetic correlation of pyrochlore Eu_2Ir_2O_7 Observed by resonant magnetic X-ray diffraction. Meeting Abstracts of the Physical Society of Japan. 2010. 65. 0. 608-608
more...
Lectures and oral presentations (13):
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Intramolecular Fragmentation of Magnetic Moments by Multi-Orbital Effect in near Quantum Spin Liquid
(International Symposium on Crystalline Organic Metals, Superconductors, and Ferromagnets (ISCOM 2019) 2019)
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Low temperature magnetic continuum excitation in spin-orbit entangled (Cation) [Pt(dmit)2]2
(International Workshop on Organic Molecular Systems 2017)
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Marginal Mott behavior of Jeff= 1/2 iridates Srn+1IrnO3n+1 evidenced by magnetic X-ray scattering
(Magnetism in Quantum Beam Science 2013)
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Magnetic correlation of spin- orbit Mott insulator Sr2IrO4
(RIKEN-Kazan Federal University (KFU) Joint Symposium 2012)
-
Spin excitation of three dimensional spin liquid Na4Ir3O8
(New Froniters of Low Temperature Physics 2011)
more...
Education (2):
- - 2001 The University of Tokyo
- - 1996 The University of Tokyo Faculty of Science
Professional career (2):
- Doctor, Science (The University of Tokyo)
- Master, Science (The University of Tokyo)
Work history (5):
- 2008/04 - 現在 RIKEN
- 2004 - 2008 The University of Tokyo The Graduate School of Engineering
- 2004 - 2008 Assistant Professor, University of Tokyo
- 2001 - 2004 岡崎国立共同研究機構分子科学研究所助手
- 2001 - 2004 Resarch Associate, Institute for Molecular Science, Okazaki National Reserch Institutes
Committee career (4):
- 2014 - 2018 日本物理学会 日本物理学会 ホームページ運営委員
- 2011 - 2017 日本物理学会 日本物理学会 学会誌編集委員
- 2014 - 2014 日本物理学会 日本物理学会 選挙管理委員
- 2009 - 2010 日本物理学会 日本物理学会 領域3(磁性) 領域運営委員
Association Membership(s) (2):
American Physical Society
, 日本物理学会
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