Generation and control of photoinduced ultrafast dynamics in strongly correlated electron systems with multiple degrees of freedom

• Project/Area Number: 26800163
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics I
• Research Institution: University of Tsukuba
• Principal Investigator: Maeshima Nobuya 筑波大学, 計算科学研究センター, 講師 (90390658)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 光物性 / 強相関電子系 / 光誘起相転移 / コヒーレントフォノン / フロケ状態 / スピン励起状態 / 光学応答 / 超高速現象 / Fano共鳴 / LOフォノン / 軌道自由度 / 電子格子相互作用 / モット絶縁体

Outline of Final Research Achievements

There are many materials which shows photoinduced phenomena including photoinduced phase transitions, induced by photo irradiation. In this study, we theoreticaly investigate physical properties of quantum states emerging in the initial process of the photoexcitation. In particular, we analyze photoexcited states of various strongly correlated electron systems, ultrafast coherent-phonon generation and related transient Fano resonance in bulk semiconductors, laser-induced resonance states with long lifetime in semiconductor superlattices by using numerical techniques.

Research Products

• [Journal Article] Quantum Generation Dynamics of Coherent Phonons: Analysis of Transient Fano Resonance (2017)
  • Author(s): Yohei Watanabe, Ken-ichi Hino, Muneaki Hase, Nobuya Maeshima
  • Journal Title: Journal of Physics: Conference Series Volume: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Polaronic quasiparticle picture for generation dynamics of coherent phonons in semiconductors: Transient and nonlinear Fano resonance (2017)
  • Author(s): Yohei Watanabe, Ken-ichi Hino, Muneaki Hase, and Nobuya Maeshima
  • Journal Title: Physical Review B Volume: 95 Issue: 1
  • DOI: 10.1103/physrevb.95.014301
  • NAID: 120007135168
  • Peer Reviewed / Open Access
• [Journal Article] Spin and Orbital Correlations of a Photoexcited State of a Two-Orbital Hubbard Model (2015)
  • Author(s): Fumihiro Imoto, Hikaru Takenaka, Nobuya Maeshima, and Ken-ichi Hino
  • Journal Title: J. Phys. Soc. Jpn. Volume: ８４ Issue: 12 Pages: 124705-124705
  • DOI: 10.7566/jpsj.84.124705
  • Peer Reviewed
• [Presentation] 1次元拡張イオン性ハバード模型の低エネルギー領域における光励起状態II (2016)
  • Author(s): 横井浩太, 前島展也, 日野健一
  • Organizer: 日本物理学会 2016年秋季大会
  • Place of Presentation: 金沢大学
  • Year and Date: 2016-09-13
• [Presentation] コヒーレントフォノン生成量子ダイナミクスにおけるパルスレーザー依存性 (2016)
  • Author(s): 渡辺陽平, 日野健一, 長谷宗明, 前島展也
  • Organizer: 日本物理学会 2016年秋季大会
  • Place of Presentation: 金沢大学
  • Year and Date: 2016-09-13
• [Presentation] Quantum generation dynamics of coherent phonons: Analysis of transient Fano resonance (2016)
  • Author(s): Yohei Watanabe, Ken-ichi Hino, Muneaki Hase, Nobuya Maeshima
  • Organizer: ICPS2016
  • Place of Presentation: Beijing, China
  • Year and Date: 2016-07-31
  • Int'l Joint Research
• [Presentation] 1次元拡張イオン性ハバード模型の低エネルギー領域における光励起状態 (2016)
  • Author(s): 横井浩太, 前島展也, 日野健一
  • Organizer: 日本物理学会 第71回年次大会
  • Place of Presentation: 東北学院大（宮城県仙台市）
  • Year and Date: 2016-03-19
• [Presentation] 1次元拡張イオン性ハバード模型におけるレーザー誘起ダイナミクス (2014)
  • Author(s): 前島展也, 日野健一
  • Organizer: 日本物理学会 2014年秋季大会
  • Place of Presentation: 中央大学 春日井キャンパス
  • Year and Date: 2014-09-07 – 2014-09-10