Theory of photo-induced quantum dynamics in strongly correlated materials showing charge and spin transitions

• Project/Area Number: 26400377
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Seo Hitoshi 国立研究開発法人理化学研究所, 開拓研究本部, 専任研究員 (30415054)
• Research Collaborator: Ishihara Sumio
• Project Period (FY): 2014-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 光誘起相転移 / 電荷秩序 / 量子ダイナミクス / スピン転移

Outline of Final Research Achievements

We have built out the basic theory of photo-induced quantum dynamics induced by short-pulse laser light irradiated into strongly-correlated molecular solids showing typical symmetry breaking such as those with metal-insulator transitions. By numerically simulating a simplified model for initial stage dynamics, considering the coupling between the incident light and the interacting fermion system, we have elucidated the mechanism of the emergence of inhomogeneous state experimentally observed, through domain creation and growth.

Academic Significance and Societal Importance of the Research Achievements

本研究の学術的特色は、ボトムアップ型に理論的知見を積み上げることで実際に観測されている現象に迫る点である。それぞれの物質系での現象を俯瞰的に見直し、今後の物質設計へのフィードバックも含めた強相関系の光誘起ダイナミクスにおけるguiding principleの構築が挙げられる。これらは、応用研究にも繋がり得る光スイッチング現象の基礎原理解明に貢献することはもちろん、より広い凝縮分子系一般への展開も期待される。すなわち、光合成中心やヘムタンパク質に代表される金属錯体系生体関連物質への展開も考えられ、境界分野へのインパクトを与え将来的に新分野開拓の可能性も十分ある。

Research Products

• [Journal Article] Electronic Structure Calculation and Superconductivity in λ-(BETS)2GaCl4 (2018)
  • Author(s): Aizawa Hirohito、Koretsune Takashi、Kuroki Kazuhiko、Seo Hitoshi
  • Journal Title: Journal of the Physical Society of Japan Volume: 87 Issue: 9 Pages: 093701-093701
  • DOI: 10.7566/jpsj.87.093701
  • NAID: 210000134936
  • 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] Phase competition and superconductivity in kappa-(BEDT-TTF)2X: Importance of intermolecular Coulomb interactions (2017)
  • Author(s): H. Watanabe, H. Seo, S. Yunoki
  • Journal Title: Journal of the Physical Society of Japan Volume: 87 Issue: 3 Pages: 033703-033703
  • DOI: 10.7566/jpsj.86.033703
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Phase Competition, Solitons, and Domain Walls in Neutral-Ionic Transition Systems (2016)
  • Author(s): M. Tsuchiizu, H. Yoshioka, H. Seo
  • Journal Title: Journal of the Physical Society of Japan Volume: 86 Issue: 10 Pages: 104705-104705
  • DOI: 10.7566/jpsj.85.104705
  • NAID: 40020959370
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Theory of valence transition in BiNiO3 (2016)
  • Author(s): M. Naka, H. Seo, and Y. Motome
  • Journal Title: Phys. Rev. Lett. Volume: 116 Issue: 5
  • DOI: 10.1103/physrevlett.116.056402
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] First-principles study of hydrogen-bonded molecular conductor kappa-H3(Cat-EDT-TTF/ST)2 (2015)
  • Author(s): T. Tsumuraya, H. Seo, R. Kato, and T. Miyazaki
  • Journal Title: Phys. Rev. B Volume: 92 Issue: 3
  • DOI: 10.1103/physrevb.92.035102
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Photo-Induced Phase Transition in Charge Order Systems -Charge Frustration and Interplay with Lattice- (2015)
  • Author(s): H. Hashimoto, H. Matsueda, H. Seo, and S. Ishihara
  • Journal Title: J. Phys. Soc. Jpn. Volume: 84 Issue: 11 Pages: 113702-113702
  • DOI: 10.7566/jpsj.84.113702
  • NAID: 210000133715
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Fragment Model Study of Molecular Multi-Orbital System X[Pd(dmit)2]2 (2015)
  • Author(s): H. Seo, T. Tsumuraya, M. Tsuchiizu, T. Miyazaki, R. Kato
  • Journal Title: J. Phys. Soc. Jpn Volume: 84 Issue: 4 Pages: 044716-044716
  • DOI: 10.7566/jpsj.84.044716
  • NAID: 210000133530
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Long-Period Charge Correlations in Charge-Frustrated Molecular θ-(BEDT-TTF)2X (2014)
  • Author(s): 中惇、妹尾仁嗣
  • Journal Title: J. Phys. Soc. Jpn. Volume: 83 Issue: 5 Pages: 53706-53706
  • DOI: 10.7566/jpsj.83.053706
  • NAID: 210000133065
  • Peer Reviewed / Open Access
• [Journal Article] Magnetic Field Effect in One-Dimensional Charge Ordering Systems (2014)
  • Author(s): Yuichi Otsuka, Hitoshi Seo, and Yukitoshi Motome
  • Journal Title: Journal of the Physical Society of Japan Volume: 83 Issue: 8 Pages: 083703-083703
  • DOI: 10.7566/jpsj.83.083703
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Photo-induced dynamics in frustrated charge ordered systems (2014)
  • Author(s): Hiroshi Hashimoto, Hiroaki Matsueda, Hitoshi Seo, and Sumio Ishihara
  • Journal Title: Journal of the Physical Society of Japan Volume: 83 Issue: 12 Pages: 123703-123703
  • DOI: 10.7566/jpsj.83.123703
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Ground state properties of κ-BEDT-TTF2X; 3/4-filled case and carrier doping (2018)
  • Author(s): Hitoshi Seo
  • Organizer: 4th International Conference on Functional Materials Science 2018 (ICFMS2018)
  • Int'l Joint Research / Invited
• [Presentation] Theory of photo-induced melting of charge order (2018)
  • Author(s): H. Seo, Y. Tanaka, and S. Ishihara
  • Organizer: International Conference on Coordination Chemistry (ICCC2018)
  • Int'l Joint Research
• [Presentation] Ground state properties of κ-BEDT-TTF2X; 3/4-filled case and carrier doping (2018)
  • Author(s): H. Watanabe, H. Seo, and S. Yunoki
  • Organizer: International Conference on Science and Technology of Synthetic Metals (ICSM2018)
  • Int'l Joint Research
• [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
• [Presentation] 1 次元電荷秩序系における光誘起現象の理論的研究 -非一様性と融解- (2018)
  • Author(s): 妹尾仁嗣, 田仲康寛，石原純夫,
  • Organizer: 日本物理学会第73 回年次大会
• [Presentation] 平均場近似による電荷秩序系の光誘起初期ダイナミクスの研究II (2017)
  • Author(s): 妹尾仁嗣、石原純夫
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学（大阪府豊中市）
  • Year and Date: 2017-03-19
• [Presentation] Early-Stage Dynamics in Photo-Induced Melting of Charge Order -Role of Inhomogeneity- (2017)
  • Author(s): H. Seo, Y. Tanaka, S. Ishihara
  • Organizer: 12th Interna- tional Symposium on Crystalline Organic Metals, Superconductors and Magnets
  • Int'l Joint Research
• [Presentation] Theoretical Studies on Molecular Conductors as Strongly Correlated Electron Systems (2017)
  • Author(s): H. Seo
  • Organizer: International Workshop on Organic Molecule Systems
  • Int'l Joint Research / Invited
• [Presentation] 平均場近似による電荷秩序系の光誘起初期ダイナミクスの研究 (2016)
  • Author(s): 妹尾仁嗣、石原純夫
  • Organizer: 日本物理学会2016年秋季大会
  • Place of Presentation: 金沢大学（石川県金沢市）
  • Year and Date: 2016-09-13
• [Presentation] 巨大負熱膨張の理論：金属間電荷移動と電荷秩序の観点から (2015)
  • Author(s): 妹尾仁嗣
  • Organizer: 日本 物理学会2015 年秋季大会
  • Place of Presentation: 関西大学、日本
  • Year and Date: 2015-09-17
  • Invited
• [Presentation] Titled stripe-type charge order and destabilization of the threefold state in theta-(BEDT-TTF)2X (2015)
  • Author(s): H. Seo and M. Naka
  • Organizer: 11th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets (ISCOM2015)
  • Place of Presentation: Bad Goegging, Germany
  • Year and Date: 2015-09-08
  • Int'l Joint Research
• [Presentation] Effective model study of molecular conductors: application to Pd(dmit)2 systems (2014)
  • Author(s): H. Seo
  • Organizer: 1st RIKEN-Sophia Joint Symposium: Recent Progresses on the Muon-Site Estimation
  • Place of Presentation: Sophia Univ., Chiyoda-ku, Tokyo, Japan
  • Year and Date: 2014-12-15
  • Invited
• [Presentation] 多軌道系X[Pd(dmit)2]2におけるスピンおよび電荷格子秩序相の競合 (2014)
  • Author(s): 妹尾仁嗣, 圓谷貴夫, 土射津昌久, 宮崎剛, 加藤礼三
  • Organizer: 日本物理学会2014年秋季大会
  • Place of Presentation: 中部大学, 愛知県春日井市
  • Year and Date: 2014-09-09
• [Presentation] Fragment model and phase competition in Pd(dmit)2-based multi-orbital molecular conductors (2014)
  • Author(s): H. Seo
  • Organizer: International Conference on Science and Technology of Synthetic Metals (ICSM2014)
  • Place of Presentation: LOGOMO, Turku, Finland
  • Year and Date: 2014-07-02