Electronic State of Excitonic Insulator from viewpoint of Orbital Physics

• Project/Area Number: 17H02916
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: 石原 純夫 東北大学, 理学研究科, 教授 (30292262)
• Co-Investigator(Kenkyū-buntansha): 山内 邦彦 大阪大学, 産業科学研究所, 助教 (00602278) ; 堀田 知佐 東京大学, 大学院総合文化研究科, 准教授 (50372909)
• Project Period (FY): 2017 – 2019
• Project Status: Discontinued (Fiscal Year 2019)
• Budget Amount: ¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000); Fiscal Year 2019: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2018: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000); Fiscal Year 2017: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
• Keywords: 励起子絶縁体 / BiCo03 / スピンダイマー模型 / 四重極相 / マルチフェロイクス / 強相関 / 軌道自由度 / 強相関電子系 / 電子相関 / 磁性 / 光物性 / 誘電体物性

Outline of Annual Research Achievements

[1]強相関拡張された二軌道ハバード模型では、高スピン(HS)相と低スピン(LS)相の間に励起子絶縁体が現れる。この相境界付近で、弱いスピン軌道相互作用を採り入れると、HS相に内在する四重極自由度の揺らぎにより帯磁率が著しく増強されることを明らかにした。
[2][1]の励起子絶縁体の模型において、変分クラスタ法を用いてvertex補正まで取りいれ、光学電導度を計算したところ、励起子絶縁相においては鋭いピークと連続スベクトルという特徴的な構造が得られ、この構造の積分値が励起子の秩序変数でスケールすることから、この相を特徴づける観測量であることを明らかにした。
[3][1]の2軌道ハバード模型の電荷自由度をスピン自由度に読み替えたダイマースピンモデルのうちで、S=1から構成される系において3種類の四重極相を見出し、そのうちフェロネマティック相の比熱の温度依存性に特異なリエントラント現象が生じることを明らかにした。これらの四重極相は[1]の模型の励起子相と読み直すことができる。
[4]励起子絶縁体の候補物質のコバルト酸化物のうち、反強磁性と焦電性を同時に示すマルチフェロイック物質BiCo03に着目し、の第一原理電子状態計算を行った。CoサイトをFeイオンで置換した際の圧電定数の変化を調べたところ、単斜晶構造Bi(Co, Fe)03が大きな圧電定数を示すのは、Co05ピラミッド配位の頂点酸素原子が対称性を下げることなく変位することにより、ピエゾテンソルの非対角項に寄与することが原因であることが分かった。また、スピン軌道相互作用を考慮したバンド計算により、反強磁性磁気空間群の対称性から許されるラシュバ効果を示すことを計算予測した。
[5][4]のBiCo03のスピン軌道相互作用の効果の理解に参考となる有効モデルとして 反強磁性絶縁体の一般化モデルを考案し、擬スピン描像を用いて系の性質をその詳細によらず解析的に明らかにする方法論を開発した。2種類のマグノン(擬スピン自由度)が混成して熱ホール効果やスピンテクスチャを生じる機構として、過去に知られていたスピン軌道相互作用以外に、Kitaev相互作用を含め、多くの空間的に反対称な相互作用が新たに加わることを明らかにした。

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] ソウル大学(韓国)
• [Journal Article] Optical response in the excitonic insulating state: Variational cluster approach (2020)
  • Author(s): Li Hengyue、Otsuki Junya、Naka Makoto、Ishihara Sumio
  • Journal Title: Physical Review B Volume: 101 Issue: 12 Pages: 125117-125117
  • DOI: 10.1103/physrevb.101.125117
  • Peer Reviewed
• [Journal Article] High Harmonic Generation in a Correlated Electron System (2020)
  • Author(s): Shohei Imai, Atsushi Ono, and Sumio Ishihara
  • Journal Title: Phys. Rev. Lett. Volume: 124 Issue: 15 Pages: 157404-157404
  • DOI: 10.1103/physrevlett.124.157404
  • Peer Reviewed
• [Journal Article] Electric-Field-Induced Antiferromagnetic Insulating State in a Metallic Ferromagnet (2020)
  • Author(s): Atsushi Ono, Sumio Ishihara
  • Journal Title: Journal of the Physical Society of Japan Volume: 89 Issue: 9 Pages: 095001-095001
  • DOI: 10.7566/jpsj.89.095001
  • NAID: 210000158390
  • Peer Reviewed
• [Journal Article] Strong enhancement of magnetic susceptibility induced by spin-nematic fluctuations in an excitonic insulating system with spin-orbit coupling (2020)
  • Author(s): Nasu Joji、Naka Makoto、Ishihara Sumio
  • Journal Title: Physical Review B Volume: 102 Issue: 4 Pages: 045143-045143
  • DOI: 10.1103/physrevb.102.045143
  • Peer Reviewed
• [Journal Article] Petahertz non-linear current in a centrosymmetric organic superconductor (2020)
  • Author(s): Y. Kawakami, T. Amano, H. Ohashi, H. Itoh, Y. Nakamura, H. Kishida, T. Sasaki, G. Kawaguchi, H. M. Yamamoto, K. Yamamoto, S. Ishihara, K. Yonemitsu, and S. Iwai
  • Journal Title: Nature Communications Volume: 11 Issue: 1 Pages: 4138-4138
  • DOI: 10.1038/s41467-020-17776-3
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multiple quadrupolar or nematic phases driven by the Heisenberg interactions in a spin-1 dimer system forming a bilayer (2020)
  • Author(s): Tanaka Katsuhiro、Hotta Chisa
  • Journal Title: Physical Review B Volume: 101 Issue: 9 Pages: 094422-094422
  • DOI: 10.1103/physrevb.101.094422
  • Peer Reviewed
• [Journal Article] Spin-Orbital Glass Transition in a Model of a Frustrated Pyrochlore Magnet without Quenched Disorder (2020)
  • Author(s): Mitsumoto Kota、Hotta Chisa、Yoshino Hajime
  • Journal Title: Physical Review Letters Volume: 124 Issue: 8 Pages: 087201-087201
  • DOI: 10.1103/physrevlett.124.087201
  • Peer Reviewed
• [Journal Article] 光によるスピン秩序の高速制御 (2020)
  • Author(s): 小野淳, 石原純夫
  • Journal Title: 日本物理学会誌 Volume: 75 Pages: 77-77
  • NAID: 130007892065
• [Journal Article] 反強磁性絶縁体のマグノン励起にみられるスピンテクスチャと異常熱ホール効果 (2020)
  • Author(s): 川野 雅敬, 堀田 知佐
  • Journal Title: 固体物理 Volume: 55 Pages: 41-50
  • NAID: 40022191438
• [Journal Article] Photoinduced Ultrafast Phenomena in Correlated Electron Magnets (2019)
  • Author(s): Sumio Ishihara
  • Journal Title: Journal of the Physical Society of Japan Volume: 88 Issue: 7 Pages: 28-28
  • DOI: 10.7566/jpsj.88.072001
  • NAID: 40021949223
  • Peer Reviewed
• [Journal Article] Discovering momentum-dependent magnon spin texture in insulating antiferromagnets: Role of the Kitaev interaction (2019)
  • Author(s): Kawano Masataka、Hotta Chisa
  • Journal Title: Physical Review B Volume: 100 Issue: 17 Pages: 174402-174402
  • DOI: 10.1103/physrevb.100.174402
  • Peer Reviewed
• [Journal Article] Bulk Rashba effect in multiferroics: A theoretical prediction for BiCoO3 Kunihiko Yamauchi (2019)
  • Author(s): Kunihiko Yamauchi, Paolo Barone, and Silvia Picozzi
  • Journal Title: Physical Review B Volume: 100 Issue: 24 Pages: 245115-245115
  • DOI: 10.1103/physrevb.100.245115
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Nonequilibrium susceptibility in photoinduced Floquet states (2019)
  • Author(s): Atsushi Ono, Sumio Ishihara
  • Journal Title: Phys. Rev. B Volume: 100 Issue: 7 Pages: 15-15
  • DOI: 10.1103/physrevb.100.075127
  • Peer Reviewed
• [Journal Article] Orbital-selective confinement effect of Ru 4d orbitals in SrRuO3 ultrathin film (2019)
  • Author(s): Kang Soonmin、Tseng Yi、Kim Beom Hyun、Yun Seokhwan、Sohn Byungmin、Kim Bongju、McNally Daniel、Paris Eugenio、Kim Choong H.、Kim Changyoung、Noh Tae Won、Ishihara Sumio、Schmitt Thorsten、Park Je-Geun
  • Journal Title: Physical Review B Volume: 99 Issue: 4 Pages: 045113-045113
  • DOI: 10.1103/physrevb.99.045113
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Photoinduced Topological Spin Texture in a Metallic Ferromagnet (2019)
  • Author(s): Ono Atsushi、Ishihara Sumio
  • Journal Title: Journal of the Physical Society of Japan Volume: 88 Issue: 2 Pages: 023703-023703
  • DOI: 10.7566/jpsj.88.023703
  • NAID: 210000135082
  • Peer Reviewed
• [Journal Article] レーザ光でスピン秩序を操作する (2019)
  • Author(s): 石原純夫，小野 淳
  • Journal Title: レーザー加工学会誌 Volume: 26 Pages: 38-40
  • NAID: 40021859416
  • Peer Reviewed
• [Journal Article] Designing Rashba?Dresselhaus effect in magnetic insulators (2019)
  • Author(s): Masataka Kawano, Yoshinori Onose, Chisa Hotta
  • Journal Title: Communications Physics Volume: 2 Issue: 1
  • DOI: 10.1038/s42005-019-0128-6
  • Peer Reviewed / Open Access
• [Journal Article] Thermal Hall effect and topological edge states in a square-lattice antiferromagnet (2019)
  • Author(s): Masataka Kawano, Chisa Hotta
  • Journal Title: Physical Review B Volume: 99 Issue: 5 Pages: 054422-054422
  • DOI: 10.1103/physrevb.99.054422
  • Peer Reviewed
• [Journal Article] Quantum paramagnet near spin-state transition (2018)
  • Author(s): K. Tomiyasu, N. Ito, R. Okazaki, Y. Takahashi, M. Onodera, K. Iwasa, T. Nojima, T. Aoyama, K. Ohgushi, Y. Ishikawa, T. Kamiyama, S. Ohira-Kawamura, M. Kofu and S. Ishihara
  • Journal Title: Advanced Quantum Technology Volume: 2018 Issue: 3 Pages: 1800057-1800057
  • DOI: 10.1002/qute.201800057
  • Peer Reviewed / Open Access
• [Journal Article] Probing ultrafast spin-relaxation and precession dynamics in a cuprate Mott insulator with seven-femtosecond optical pulses (2018)
  • Author(s): T. Miyamoto, Y. Matsui, T. Terashige, T. Morimoto, N. Sono, H. Yada, S. Ishihara, Y. Watanabe, S. Adachi, T. Ito, K. Oka, A. Sawa & H. Okamoto
  • Journal Title: Nature Communications Volume: 9
  • Peer Reviewed / Open Access
• [Journal Article] Photoinduced collective mode, inhomogeneity, and melting in a charge-order system (2018)
  • Author(s): Seo Hitoshi、Tanaka Yasuhiro、Ishihara Sumio
  • Journal Title: Physical Review B Volume: 98 Issue: 23 Pages: 235150-235150
  • DOI: 10.1103/physrevb.98.235150
  • Peer Reviewed
• [Journal Article] Photocontrol of magnetic structure in an itinerant magnet (2018)
  • Author(s): Ono Atsushi、Ishihara Sumio
  • Journal Title: Physical Review B Volume: 98 Issue: 21 Pages: 214408-214408
  • DOI: 10.1103/physrevb.98.214408
  • Peer Reviewed
• [Journal Article] Charge disproportionation of Mn 3d and O 2p electronic states depending on strength of p?d hybridization in (LaMnO3)2(SrMnO3)2 superlattices (2018)
  • Author(s): Nakao Hironori、Tabata Chihiro、Murakami Youichi、Yamasaki Yuichi、Yamada Hiroyuki、Ishihara Sumio、Kawasaki Masashi
  • Journal Title: Physical Review B Volume: 98 Issue: 24 Pages: 245146-245146
  • DOI: 10.1103/physrevb.98.245146
  • Peer Reviewed
• [Journal Article] Magnetic structural unit with convex geometry: A building block hosting an exchange-striction-driven magnetoelectric coupling (2018)
  • Author(s): Kenta Kimura, Yasuyuki Kato, Kunihiko Yamauchi, Atsushi Miyake, Masashi Tokunaga, Akira Matsuo, Koichi Kindo, Mitsuru Akaki, Masayuki Hagiwara, Shojiro Kimura, Masayuki Toyoda, Yukitoshi Motome, and Tsuyoshi Kimura
  • Journal Title: Phys. Rev. Mater. Volume: 2 Issue: 10 Pages: 104415-104415
  • DOI: 10.1103/physrevmaterials.2.104415
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] From Linear to Nonlinear Responses of Thermal Pure Quantum States (2018)
  • Author(s): Hiroyuki Endo, Chisa Hotta, Akira Shimizu
  • Journal Title: Physical Review Letters Volume: 121 Issue: 22
  • DOI: 10.1103/physrevlett.121.220601
  • Peer Reviewed
• [Journal Article] Magnetic susceptibility of quantum spin systems calculated by sine square deformation: One-dimensional, square lattice, and kagome lattice Heisenberg antiferromagnets (2018)
  • Author(s): Chisa Hotta, Kenichi Asano
  • Journal Title: Physical Review B Volume: 98 Issue: 14
  • DOI: 10.1103/physrevb.98.140405
  • Peer Reviewed
• [Journal Article] Kinetic frustration induced supersolid in the S=1/2 kagome lattice antiferromagnet in a magnetic field (2018)
  • Author(s): Plat Xavier、Momoi Tsutomu、Hotta Chisa
  • Journal Title: Physical Review B Volume: 98 Issue: 1
  • DOI: 10.1103/physrevb.98.014415
  • Peer Reviewed
• [Journal Article] Spin nematics next to spin singlets (2018)
  • Author(s): Yuto Yokoyama, Chisa Hotta
  • Journal Title: Physical Review B Volume: 97 Issue: 18
  • DOI: 10.1103/physrevb.97.180404
  • Peer Reviewed
• [Journal Article] Origin of Biquadratic Exchange Interactions in a Mott Insulator as a Driving Force of Spin Nematic Order (2018)
  • Author(s): Tanaka Katsuhiro、Yokoyama Yuto、Hotta Chisa
  • Journal Title: Journal of the Physical Society of Japan Volume: 87 Issue: 2 Pages: 023702-023702
  • DOI: 10.7566/jpsj.87.023702
  • NAID: 210000134685
  • Peer Reviewed
• [Journal Article] Quantum-disordered state of magnetic and electric dipoles in an organic Mott system (2017)
  • Author(s): Shimozawa M.、Hashimoto K.、Ueda A.、Suzuki Y.、Sugii K.、Yamada S.、Imai Y.、Kobayashi R.、Itoh K.、Iguchi S.、Naka M.、Ishihara S.、Mori H.、Sasaki T.、Yamashita M.
  • Journal Title: Nature Communications Volume: 8 Issue: 1 Pages: 1-6
  • DOI: 10.1038/s41467-017-01849-x
  • Peer Reviewed / Open Access
• [Journal Article] Double-Exchange Interaction in Optically Induced Nonequilibrium State: A Conversion from Ferromagnetic to Antiferromagnetic Structure (2017)
  • Author(s): Atsushi Ono and Sumio Ishihara
  • Journal Title: Physical Review Letters Volume: 119 Issue: 20
  • DOI: 10.1103/physrevlett.119.207202
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Coulomb Correlations Intertwined with Spin and Orbital Excitations in LaCoO3 (2017)
  • Author(s): K. Tomiyasu, J. Okamoto, H. Y. Huang, Z. Y. Chen, E. P. Sinaga, W. B. Wu, Y. Y. Chu, A. Singh, R.-P. Wang, F. M. F. de Groot, A. Chainani, S. Ishihara, C. T. Chen, and D. J. Huang
  • Journal Title: Phys. Rev. Lett. Volume: 119 Issue: 19
  • DOI: 10.1103/physrevlett.119.196402
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spin and Charge Fluctuations near Metal-Insulator Transition in Dimer-Type Molecular Solid (2017)
  • Author(s): Naomichi Sato, Tsutomu Watanabe, Makoto Naka, Sumio Ishihara
  • Journal Title: Journal of the Physical Society of Japan Volume: 86 Issue: 5 Pages: 053701-053701
  • DOI: 10.7566/jpsj.86.053701
  • NAID: 40021185611
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Photoinduced charge-order melting dynamics in a one-dimensional interacting Holstein model (2017)
  • Author(s): Hiroshi Hashimoto and Sumio Ishihara
  • Journal Title: Phys. Rev. B Volume: 96 Issue: 3
  • DOI: 10.1103/physrevb.96.035154
  • Peer Reviewed
• [Journal Article] Polarization selectivity of charge localization induced by a 7-fs nearly single-cycle light field in an organic metal (2017)
  • Author(s): Y. Kawakami, Y. Yoneyama, T. Amano, H. Itoh, K. Yamamoto, Y. Nakamura, H. Kishida, T. Sasaki, S. Ishihara, Y. Tanaka, K. Yonemitsu, and S. Iwai
  • Journal Title: Phys. Rev. B Volume: 95 Issue: 20
  • DOI: 10.1103/physrevb.95.201105
  • Peer Reviewed
• [Journal Article] Pressure-induced two-step spin crossover in a double-layered elastic model (2017)
  • Author(s): Taniguchi Daisuke、Okabayashi Jun、Hotta Chisa
  • Journal Title: Physical Review B Volume: 96 Issue: 17 Pages: 174104-174104
  • DOI: 10.1103/physrevb.96.174104
  • Peer Reviewed
• [Journal Article] <講義ノート>フラストレートした量子多体系(第61回物性若手夏の学校 集中ゼミ) (2017)
  • Author(s): 堀田 知佐
  • Journal Title: 物性研究・電子版 Volume: 6 Issue: 4 Pages: [1]
  • DOI: 10.14989/229035
  • NAID: 120006384187
  • Open Access
• [Journal Article] Magnetodielectric detection of magnetic quadrupole order in Ba(TiO)Cu4(PO4)4 with Cu4O12 square cupolas (2016)
  • Author(s): K. Kimura, P. Babkevich, M. Sera, M. Toyoda, K. Yamauchi, G. S. Tucker, J. Martius, T. Fennell, P. Manuel, D. D. Khalyavin, R. D. Johnson, T. Nakano, Y. Nozue, H. M. Ronnow, T. Kimura
  • Journal Title: Nat. Commun. Volume: 7 Issue: 1 Pages: 130391-7
  • DOI: 10.1038/ncomms13039
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Spin-orbital glass transition in a model of frustrated pyrochlore magnet without quenched disorder (2020)
  • Author(s): Chisa Hotta
  • Organizer: Correlated Disorder workshop, Aarau, Switzerland.
  • Int'l Joint Research
• [Presentation] Theoretical Prediction of Bulk Rashba Effect in Pyroelectric Antiferromagnet BiCo03 (2020)
  • Author(s): Kunihiko Yamauchi, Paolo Barone, and Silvia Picozzi
  • Organizer: APS March meeting, Denver, Colorado
  • Int'l Joint Research
• [Presentation] 6 fs単一サイクル近赤外パルスによる有機超伝導体の第2、第3高調波発生Ⅱ (2020)
  • Author(s): 川上洋平, 天野辰哉, 伊藤弘毅, 川口玄太, 山本浩史, 中村優斗, 岸田英夫, 佐々木孝彦, 石原純夫, 米満賢治, 岩井伸一郎
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] 中性イオン性転移系における高次高調波発生 (2020)
  • Author(s): 今井渉平, 小野淳, 石原純夫
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] フェムト秒時間分解X線回折によるLaCo03薄膜の電子-格子相関ダイナミクスの直接観測 Ⅱ (2020)
  • Author(s): 深谷亮, 山崎裕一, 中尾裕則, 野澤俊介, 田端千紘, 石原純夫, 久保田雄也, 富樫格, 矢橋牧名, 藤岡淳, 十倉好紀, 足立伸一
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] スピン三重項励起子絶縁体系における光照射効果 (2020)
  • Author(s): 正木祐輔, 石原純夫
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] 反強磁性ディラック半金属における磁性・伝導性の光制御の理論 (2020)
  • Author(s): 小野淳, 石原純夫
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] 銅酸化物超伝導体における酸素K吸収端共鳴非弾性X線散乱による電子励起の研究 (2020)
  • Author(s): 松林幸宏, 石原純夫
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] 光誘起非平衡状態の理論研究 (2020)
  • Author(s): 石原純夫, 今井渉平, 正木祐輔, 小野淳
  • Organizer: 第67回応用物理学会春季学術講演会
• [Presentation] 中性イオン性転移系の高次高調波発生と強結合相関効果 (2020)
  • Author(s): 今井渉平, 小野淳, 石原純夫
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] 反強磁性ディラック半金属における磁性・伝導性の光制御の理論Ⅱ (2020)
  • Author(s): 小野淳, 石原純夫
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] 局在スピンと結合した拡張イオン性ハバード模型の光照射ダイナミクス (2020)
  • Author(s): 正木祐輔, 石原純夫
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] 銅酸化物超伝導体における酸素K吸収端共鳴非弾性X線散乱による電子励起の研究Ⅱ (2020)
  • Author(s): 松林幸宏, 石原純夫
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] 光照射による多電子系非平衡ダイナミクスの理論 (2020)
  • Author(s): 石原純夫, 今井渉平, 正木祐輔, 小野淳
  • Organizer: 第81回応用物理学会秋季学術講演会
• [Presentation] スピン 1 ダイマー三角格子におけるスピンネマティック相 (2020)
  • Author(s): 田中克大, 堀田知佐
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] MPSを用いた熱的量子純粋状態の記述 (2020)
  • Author(s): 岩木惇司, 清水明, 堀田知佐
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] Optical Manipulation of Magnetism in a Correlated Electron System (2019)
  • Author(s): S. Ishihara
  • Organizer: Superstripes 2019, Ischia, Italy
  • Int'l Joint Research / Invited
• [Presentation] Dielectrics and Magnetodielectrics in Molecular Solids as Electron-Molecule Correlated Systems (2019)
  • Author(s): S. Ishihara
  • Organizer: 11th APCTP Workshop on Multiferroics, 新竹, 台湾
  • Int'l Joint Research / Invited
• [Presentation] Photoinduced Nonequilibrium Dynamics in Correlated Electron Systems (2019)
  • Author(s): S. Ishihara
  • Organizer: International Conference on Strongly Correlated Electron Systems (SCES2019), 岡山, 日本
  • Int'l Joint Research / Invited
• [Presentation] Optical Manipulation of Magnetism in a Correlated Electron System (2019)
  • Author(s): S. Ishihara
  • Organizer: 14th APPC2019, Kuching, Malaysia
  • Int'l Joint Research
• [Presentation] Magnetic Space Group Analysis of Perovskite Magnetic Oxides (2019)
  • Author(s): Hiroshi Katsumoto, Kunihiko Yamauchi, and Tamio Oguchi
  • Organizer: International Conference on Strongly Correlated Electron Systems (SCES2019), 岡山, 日本
  • Int'l Joint Research
• [Presentation] First-Principles Study on Piezoelectricity and Magnetic Stability in Bi(Fe, Co)03 (2019)
  • Author(s): Hiroshi Katsumoto, Kunihiko Yamauchi, and Tamio Oguchi
  • Organizer: Materials Research Meting 2019, Yokohama Symposia, Yokohama, Japan.
  • Int'l Joint Research
• [Presentation] 低次元相関電子系の高次高調波発生とその機構 (2019)
  • Author(s): 石原純夫
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 相関電子系における高次高調波の発生機構Ⅱ (2019)
  • Author(s): 今井渉平, 小野淳, 石原純夫
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] スピン状態自由度のある強相関系における光照射効果と励起子絶縁相 (2019)
  • Author(s): 正木祐輔, 石原純夫
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 遍歴磁性体の光励起・緩和ダイナミクスにおけるスピン軌道相互作用の効果 (2019)
  • Author(s): 小野淳, 山下竜律, 石原純夫
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 6 fs単一サイクル近赤外パルスによる有機超伝導体の第2、第3高調波発生 (2019)
  • Author(s): 川上洋平, 天野辰哉, 伊藤弘毅, 岸田英夫, 佐々木孝彦, 石原純夫, 米満賢治, 岩井伸一郎
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 2次元電荷秩序系における光誘起初期ダイナミクスの理論 : ドメイン壁の役割 (2019)
  • Author(s): 妹尾仁嗣, 田中康寛, 石原純夫
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 光誘起構造ダイナミクス測定のためのテーブルトップフェムト秒時間分解電子線回折装置の開発 (2019)
  • Author(s): 田久保耕, 靳司辰, 羽田真毅, 東正樹, 林靖彦, 桑原真人, 宮坂等, 石原純夫, 石川忠彦, 沖本洋一, 腰原伸也
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 反強磁性マグノンの擬スピン描像を用いたKitaev-Heisenberg-γ模型のスピンテクスチャの解析 (2019)
  • Author(s): 川野雅敬, 堀田知佐
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 2次元系のスピンネマティック相における熱力学的性質 (2019)
  • Author(s): 田中克大, 堀田知佐
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] Analysis by ab-initio calculations on magnetic configuration and stability in Bi(Fe, Co)03 (2019)
  • Author(s): Hiroshi Katsumoto, Kunihiko Yamauchi, and Tamio Oguchi
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] Photocontrol of magnetic structure in a metallic ferromagnet (2019)
  • Author(s): Atsushi Ono and Sumio Ishihara
  • Organizer: APS March Meeting 2019 March 4-8 2019 Boston, MA USA
  • Int'l Joint Research
• [Presentation] 相関電子系における高次高調波の発生機構 (2019)
  • Author(s): 今井渉平, 小野淳, 石原純夫
  • Organizer: 日本物理学会第74回年次大会 2019年3月14日-17日 九州大学 福岡
• [Presentation] First-principles Study on Piezoelectricity in Bi(Fe,Co)O3 (2019)
  • Author(s): H. Katsumoto, K. Yamauchi, and T. Oguchi
  • Organizer: American Physical Society March Meeting 2019, Mar 4-8, 2019, Boston Convention and Exhibition Center (BCEC), Boston, USA
  • Int'l Joint Research
• [Presentation] Dielectrics and magnetodielectrics in molecular solids as electron-molecular correlated systems (2018)
  • Author(s): Sumio Ishihara
  • Organizer: The 14th Russian-CIS-Baltic-Japanese Symposium on Ferroelectricity (RCBJSF2018)May 14-18, 2018 Ioffe Institute, Saint-Petersburg, Russia
  • Int'l Joint Research / Invited
• [Presentation] Photoinduced transient dynamics in correlated systems (2018)
  • Author(s): Sumio Ishihara
  • Organizer: Condensed Mtter Theory and its Contribution to Society, May 26 2018 Tokyo Japan
  • Int'l Joint Research / Invited
• [Presentation] Equilibrium and non-equilibrium states in multi-orbital systems with electron corrlation -Phase competition and beyond (2018)
  • Author(s): Sumio Ishihara
  • Organizer: International School and Symposium on Ultrafast Control of Materials,June 22-14 2018 Rennes, France
  • Int'l Joint Research / Invited
• [Presentation] Optical Manipulation of Magnetism in a Correlated Electron System (2018)
  • Author(s): Sumio Ishihara and Atsushi Ono
  • Organizer: Exotic Interaction in Quantum Correlated Materials, June 10-13 2018, Krakaw, Polarnd
  • Int'l Joint Research / Invited
• [Presentation] Optical Manipulation of Magnetism in a Correlated Electron System (2018)
  • Author(s): Sumio Ishihara and Atsushi Ono
  • Organizer: New Frontier of Strongly Correlated Electron Materials, August 6-24 2018, Beijing, China
  • Int'l Joint Research / Invited
• [Presentation] Photoinduced ferromagnetic-to-antiferromagnetic transition in a correlated itinerant magnet (2018)
  • Author(s): Atsushi Ono and Sumio Ishihara
  • Organizer: International School and Symposium on Ultrafast Control of Materials June 22-14 Rennes, France
  • Int'l Joint Research
• [Presentation] Numerical study of high harmonic generation in a strongly correlated electron system (2018)
  • Author(s): Shohei Imai, Atsushi Ono and Sumio Ishihara
  • Organizer: The 9th Asian Workshop on Generation and Application of Coherent XUV and X-ray Radiation (9th AWCXR) Oct. 16-17 2018 Sapporo Japan
  • Int'l Joint Research
• [Presentation] 多電子系におけるフロケ状態と感受率 (2018)
  • Author(s): 小野淳, 石原純夫
  • Organizer: 日本物理学会 2018年秋季大会 2018年9月9日-12日 同志社大学、京都
• [Presentation] 2次元電荷秩序系における光誘起初期ダイナミクスの理論的研究 (2018)
  • Author(s): 妹尾仁嗣, 田中康寛, 石原純夫
  • Organizer: 日本物理学会 2018年秋季大会 2018年9月9日-12日 同志社大学、京都
• [Presentation] ダイマー・モット系における高次高調波発生の数値的研究 (2018)
  • Author(s): 今井渉平, 小野淳, 石原純夫
  • Organizer: 日本物理学会 2018年秋季大会 2018年9月9日-12日 同志社大学、京都
• [Presentation] First-Principles Study on Multiferroic Transition-Metal Oxides (2018)
  • Author(s): Kunihiko Yamauchi
  • Organizer: 5th International Conference of Asian Union of Magnetics Societies (IcAUMS 2018)
  • Int'l Joint Research / Invited
• [Presentation] Sine square deformation to quantum spin systems, (2018)
  • Author(s): Chisa Hotta
  • Organizer: Trends in Theory of Correlated Materials Workshop - TTCM 2018 Geneva, Swizerland, Oct. 8-10
  • Int'l Joint Research
• [Presentation] Quantum Critical Dynamics (2018)
  • Author(s): Chisa Hotta
  • Organizer: Gordon Research Conference on conductivity and Magnetism in Molecular Materials, Bryant University, RI, US, August 12 - 17, 2018
  • Int'l Joint Research / Invited
• [Presentation] Spin nematics next to spin singlets (2018)
  • Author(s): Chisa Hotta
  • Organizer: Kavli ITS Workshop: Quantum Magnetism: Frustration, Low-dimensionality, Topology, Beijing, China, Aug. 27- Sep. 14, 2018)
  • Int'l Joint Research / Invited
• [Presentation] Thermodynamic properties of quantum spin systems (2018)
  • Author(s): Chisa Hotta
  • Organizer: WE-Heraeus-Seminar on TRENDS IN QUANTUM MAGNETISM, Germany, June 4-8, 2018.
  • Int'l Joint Research / Invited
• [Presentation] Optical manipulation of magnetism in a correlated electron system (2017)
  • Author(s): S. Ishihara, and A. Ono
  • Organizer: The 6th International Conference on Photoinduced Phase Transitions
  • Int'l Joint Research
• [Presentation] Excitonic Insulating Phase in Correlated Magnetic Oxides (2017)
  • Author(s): S. Ishihara, T. Tatsuno, J. Nasu, M. Naka
  • Organizer: Moscow International Symposium on Magnetism
  • Int'l Joint Research / Invited
• [Presentation] Optical control of magnetism in double exchange system (2017)
  • Author(s): A. Ono and S. Ishihara
  • Organizer: Electron Correlation in Superconductors and Nanostructures (ECSN-2017)
  • Int'l Joint Research / Invited
• [Presentation] Excitonic insulating phase in correlated electron system (2017)
  • Author(s): S. Ishihara, T. Tatsuno, J. Nasu, M. Naka
  • Organizer: International School and Workshop on Electronic Crystals (ECRYS)-2017
  • Int'l Joint Research / Invited
• [Presentation] Exotic Electronic States in Correlated Electron Systems with Spin-State Degree of Freedom (2017)
  • Author(s): S. Ishihara, T. Tatsuno, J. Nasu, M. Naka
  • Organizer: 23th Users’ meeting and workshop in National Synchrotron Radiation Research Center
  • Int'l Joint Research / Invited
• [Presentation] Optical control of magnetism in correlated electron magnets (2017)
  • Author(s): S. Ishihara, A. Ono
  • Organizer: International Workshop Non-Linear Effects and Short-Time Dynamics in Novel Superconductors and Correlated Spin-Orbit Coupled Systems
  • Int'l Joint Research / Invited
• [Presentation] Ultrafast light induced dynamics in a correlated electron magnet (2017)
  • Author(s): S. Ishihara, and A. Ono
  • Organizer: The CEMS Symposium on Trends in Condensed Matter Physics
  • Int'l Joint Research / Invited
• [Presentation] Spin nematics out of spin singlets (2017)
  • Author(s): Chisa Hotta
  • Organizer: Novel Quantum States in Condensed Matter
  • Int'l Joint Research
• [Presentation] Interplay between ferroelectricity, spin texture, and topological properties in transition-metal oxides (2017)
  • Author(s): K. Yamauchi
  • Organizer: CECAM conference Ab initio Spin-orbitronics
  • Int'l Joint Research / Invited
• [Book] 相関電子と軌道自由度(基本法則から読み解く物理学最前線 22) (2020)
  • Author(s): 石原純夫
  • Total Pages: 178
  • Publisher: 共立出版
• [Book] Resonant x-ray scattering in correlated systems (2017)
  • Author(s): Y. Murakami and S. Ishihara (editors)
  • Total Pages: 241
  • Publisher: Springer
  • ISBN: 9783662532256