Fujiyama Shigeki

フジヤマシゲキ | Fujiyama Shigeki

Affiliation and department：
Job title： Senior Resarcher
Homepage URL (1)： http://www.riken.jp/lab-www/molecule/member/fujiyama/fujiyama.html

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 (15)：

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

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Papers (33)：

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
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
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
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
藤山茂樹, 加藤礼三. 量子スピン液体相近傍での磁気モーメントの分子内分裂. 日本物理学会誌. 2020. 75. 7. 433-438

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MISC (33)：

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
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
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
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
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

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Lectures and oral presentations (13)：

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)
Low temperature magnetic continuum excitation in spin-orbit entangled (Cation) [Pt(dmit)2]2
(International Workshop on Organic Molecular Systems 2017)
Marginal Mott behavior of Jeff= 1/2 iridates Srn+1IrnO3n+1 evidenced by magnetic X-ray scattering
(Magnetism in Quantum Beam Science 2013)
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)

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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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