Numerical Study of Spectroscopic Properties in Low-Dimensional Strongly Correlated Electron Systems

2013 Fiscal Year Final Research Report

• Project/Area Number: 22340097
• 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: Kyoto University
• Principal Investigator: TOHYAMA Takami 京都大学, 基礎物理学研究所, 教授 (70237056)
• Co-Investigator(Kenkyū-buntansha): MATSUEDA Hiroaki 仙台高等専門学校, 総合科学科, 准教授 (20396518) ; TSUTSUI Kenji 日本原子力研究開発機構, 量子ビーム応用研究部門, 研究主幹 (80291011)
• Co-Investigator(Renkei-kenkyūsha): SOTA Shigetoshi 理化学研究所, 計算科学研究機構, 研究員 (60466414) ; KANESHITA Eiji 仙台高等専門学校, 総合科学科, 准教授 (60548212)
• Project Period (FY): 2010-04-01 – 2014-03-31
• Keywords: 物性理論 / 光物性 / 密度行列繰り込み群法 / 厳密対角化法 / 低次元強相関電子系

Research Abstract

We focus on spectroscopic properties of low-dimensional strongly correlated electron systems, which can detect dynamics of spin, charge, orbital, and lattice degrees of freedom, in order to make a progress on our understanding of various quantum phenomena appearing in the systems. We use numerical techniques such as exact diagonalization and dynamical density-matrix renormalization group. We find various spectroscopic properties in the systems, for example, photoexcitation the relaxation dynamics of Mott insulators coupled to phonon, spin dynamics in low-dimensional spin systems coupled to phonon, resonant inelastic x-ray scattering in itinerant antiferromagnets and cuprate superconductors, magnetic Raman scattering in organic systems with triangular lattice. The obtained results are published in many journals.

Research Products

• [Journal Article] Magnetic Raman scattering study of spin frustrated systems, κ-(BEDT-TTF)_2X (2014)
  • Author(s): Y. Nakamura, N. Yoneyama, T. Sasaki, T. Tohyama, A. Nakamura, H. Kishida
  • Journal Title: J. Phys. Soc. Jpn Volume: 83(印刷中)
• [Journal Article] High-energy spin and charge excitations in electron-doped copper oxide superconductors (2014)
  • Author(s): K. Ishii, M. Fujita, T. Sasaki, M. Minola, G. Dellea, C. Mazzoli, K. Kummer, G. Ghiringhelli, L. Braicovich, T. Tohyama, K. Tsutsumi, K. Sato, R. Kajimoto, K. Ikeuchi, K. Yamada, M. Yoshida, M. Kurooka, J. Mizuki
  • Journal Title: Nat. Commun Volume: 5 Pages: 3714(1-8)
  • DOI: 10.1038/ncomms4714
• [Journal Article] Persistent spin excitations in doped antiferromagnets revealed by resonant inelastic light scattering (2014)
  • Author(s): C. J. Jia, E. A. Nowadnick, K. Wohlfeld, C.-C. Chen, S. Johnston, T. Tohyama, B. Moritz, T. P. Devereaux
  • Journal Title: Nat. Commun Volume: 5 Pages: 3314(1-7)
  • DOI: 10.1038/ncomms4314
• [Journal Article] Double-pulse deexcitations in a one-dimensional strongly correlated system (2014)
  • Author(s): H. Lu, J. Bonca, T. Tohyama
  • Journal Title: EPL Volume: 103 Pages: 57005(1-5)
  • DOI: 10.1209/0295-5075/103/57005
• [Journal Article] Effects of frustration on magnetic excitations in a two-leg spin-ladder system (2013)
  • Author(s): T. Sugimoto, M. Mori, T. Tohyama, S. Maekawa
  • Journal Title: Phys. Rev. B Volume: 87 Pages: 155143(1-7)
  • DOI: 10.1103/PhysRevB.87.155143
• [Journal Article] Spin dynamics and resonant inelastic x-ray scattering in chromium with commensurate spin-density wave order (2013)
  • Author(s): K . Sugimoto, Z. Li, E. Kaneshita, K. Tsutsui, T. Tohyama
  • Journal Title: Phys. Rev. B Volume: 87 Pages: 134418(1-8)
  • DOI: 10.1103/PhysRevB.87.134418
• [Journal Article] Enhanced Charge Order in a Photoexcited One-Dimensional Strongly Correlated System (2012)
  • Author(s): H. Lu, S. Sota, H. Matsueda, J. Bonca, T. Tohyama
  • Journal Title: Phys. Rev. Lett Volume: 109 Pages: 197401(1-4)
  • DOI: 10.1103/PhysRevLett.105.246404
• [Journal Article] Spin Excitation Assisted by Non-Softening Phonon for Spin-Peierls Model (2012)
  • Author(s): T. Sugimoto, S. Sota, T. Tohyama
  • Journal Title: J. Phys. Soc. Jpn Volume: 81 Pages: 034706(1-8)
  • DOI: 10.1143/JPSJ.81.034706
• [Journal Article] Relaxation Dynamics of Photocarriers in One-Dimensional Mott Insulators Coupled to Phonons (2012)
  • Author(s): H. Matsueda, S. Sota, T. Tohyama, S. Maekawa
  • Journal Title: J. Phys. Soc. Jpn Volume: 81 Pages: 013701(1-4)
  • DOI: 10.1143/JPSJ.81.013701
• [Journal Article] Electronic excitations around the substituted atom in La_2Cu_<1-y>Ni_yO_4 as seen via resonant inelastic x-ray scattering (2011)
  • Author(s): K. Ishii, K. Tsutsui, K. Ikeuchi, I. Jarrige, J. Mizuki, H. Hiraka, K. Yamada, T. Tohyama, S. Maekawa, Y. Endoh, H. Ishii, Y. Q. Cai
  • Journal Title: Phys. Rev. B Volume: 85 Pages: 104509(1-5)
  • DOI: 10.1103/PhysRevB.85.104509
• [Journal Article] Quantum Dynamics of a Driven Correlated System, Coupled to Phonons (2011)
  • Author(s): L. Vidmar, J. Bonca, S. Maekawa, T. Tohyama
  • Journal Title: Phys. Rev. Lett Volume: 107 Pages: 246404(1-4)
  • DOI: 10.1103/PhysRevLett.105.246404
• [Journal Article] Spin and orbital characters of excitations in iron arsenides revealed by simulated Fe L-edge RIXS (2011)
  • Author(s): E. Kaneshita, K. Tsutsui, T. Tohyama
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 020511(1-4)
  • DOI: 10.1103/PhysRevB.84.020511
• [Journal Article] Origin of In-Plane Anisotropy in Optical Conductivity for Antiferromagnetic Metallic Phase of Iron Pnictides (2011)
  • Author(s): K. Sugimoto, E. Kaneshita, T. Tohyama
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 033706(1-4)
  • DOI: 10.1143/JPSJ.80.033706
• [Journal Article] Enhanced Pairing Correlations near Oxygen Dopants in Cuprate Superconductors (2010)
  • Author(s): G. Khaliullin, M. Mori, T. Tohyama, S. Maekawa
  • Journal Title: Phys. Rev. Lett Volume: 105 Pages: 257005(1-4)
  • DOI: 10.1103/PhysRevLett.105.257005
• [Journal Article] Density matrix renormalization group study of optical conductivity in the one-dimensional Mott insulator Sr_2CuO_3 (2010)
  • Author(s): S. Sota, T. Tohyama
  • Journal Title: Phys. Rev. B Volume: 82 Pages: 195130(1-5)
  • DOI: 10.1103/PhysRevB.82.195130
• [Journal Article] Spin and charge dynamics ruled by antiferromagnetic order in iron pnictide superconductors (2010)
  • Author(s): E. Kaneshita, T. Tohyama
  • Journal Title: Phys. Rev. B Volume: 82 Pages: 094441(1-5)
  • DOI: 10.1103/PhysRevB.82.094441
• [Journal Article] Chirality in spin- 1/2 zigzag XY chain : Low-temperature density-matrix renormalization group study (2010)
  • Author(s): T. Sugimoto, S. Sota, T. Tohyama
  • Journal Title: Phys. Rev. B Volume: 82 Pages: 035437(1-6)
  • DOI: 10.1103/PhysRevB.82.035437
• [Presentation] 3d 電子系高温超伝導体における共鳴非弾性X線散乱理論 (2014)
  • Author(s): 遠山貴巳
  • Organizer: 日本物理学会第69回年次大会領域5 シンポジウム
  • Place of Presentation: 東海大学
  • Year and Date: 2014-03-27
• [Presentation] Electronic excitations in 3d transition-metal compounds revealed by simulated resonant inelastic x-ray scattering (2013)
  • Author(s): T. Tohyama
  • Organizer: Light and Particle Beams in Materials Science 2013
  • Place of Presentation: Tsukuba, JAPAN
  • Year and Date: 2013-08-31
• [Presentation] Resonant Inelastic X-ray Scattering in Chromium (2013)
  • Author(s): T. Tohyama
  • Organizer: The 8th International Conference on Inelastic X-ray Scattering
  • Place of Presentation: Stanford, USA
  • Year and Date: 2013-08-13
• [Presentation] 遷移金属化合物のL端共鳴非弾性X線散乱の理論 (2013)
  • Author(s): 遠山貴巳
  • Organizer: 物性研究所短期研究会「真空紫外・軟X線放射光物性研究の将来」
  • Place of Presentation: 東京大学物性研究所
  • Year and Date: 2013-05-29
• [Presentation] 強相関電子系の光誘起励起ダイナミクス (2013)
  • Author(s): 遠山貴巳
  • Organizer: 日本物理学会第68回年次大会領域5, 理論核物理領域, 実験核物理領域合同シンポジウム
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-27
• [Presentation] 先端スペクトロスコピーと連携した強相関電子系の励起ダイナミクス研究 (2012)
  • Author(s): 遠山貴巳
  • Organizer: 物性研究所計算物質科学研究センター 第2回シンポジウム
  • Place of Presentation: 東京大学物性研究所
  • Year and Date: 2012-10-23
• [Presentation] Nonequilibrium photo dynamics of low-dimensional strongly correlated electron systems (2012)
  • Author(s): T. Tohyama
  • Organizer: Electronic States and Phases Induced by Electric or Optical Impacts
  • Place of Presentation: Orsay, FRANCE
  • Year and Date: 2012-09-12
• [Presentation] Spin and charge excitations in cuprates and iron pnictides revealed by simulated resonant inelastic x-ray scattering (2012)
  • Author(s): T. Tohyama
  • Organizer: The 19th International Conference on Magnetism with Strongly Correlated Electron Systems
  • Place of Presentation: Busan, KOREA
  • Year and Date: 2012-07-10
• [Presentation] Nonequilibrium photo dynamics of low-dimensional strongly correlated electron systems (2012)
  • Author(s): T. Tohyama
  • Organizer: The Korean Physical Society Meeting
  • Place of Presentation: Dajeon, KOREA
  • Year and Date: 2012-04-24
• [Presentation] スピン・パイエルス物質CuGeO3におけるスピンダイナミクス (2011)
  • Author(s): 遠山貴巳
  • Organizer: WCROSSROAD of Users and J-PARC 第1回「J-PARC における強相関系や機能材料研究の将来」
  • Place of Presentation: 総合科学研究機構東海事業センター(茨城県東海村)
  • Year and Date: 2011-10-17
• [Presentation] Spin and Charge Excitations in the Antiferromagnetic Metallic Phase of Iron Arsenides : Inelastic Neutron Scattering and Resonant Inelastic X-Ray Scattering (2011)
  • Author(s): T. Tohyama
  • Organizer: The 26th International Conference on Low Temperature Physics
  • Place of Presentation: Beijing, CHINA
  • Year and Date: 2011-08-14
• [Presentation] Theory of Inelastic X-Ray Resonance Scattering in Iron Arsenides (2011)
  • Author(s): T. Tohyama
  • Organizer: 8th International Conference on Stripes and High Tc Superconductivity
  • Place of Presentation: Rome, ITALY
  • Year and Date: 2011-07-13
• [Presentation] Electronic and Magnetic Properties in the Antiferromagnetic Metallic Phase of Iron Pnictide Superconductors (2011)
  • Author(s): T. Tohyama
  • Organizer: 11th Korea-Japan-Taiwan Symposium on Strongly Correlated Electron System
  • Place of Presentation: Jeju, KOREA
  • Year and Date: 2011-02-11
• [Presentation] Electronic and Magnetic Properties in the Antiferromagnetic Metallic Phase of Iron Pnictide Superconductors (2010)
  • Author(s): T. Tohyama
  • Organizer: The 9th Asia Pacific Workshop on Material Physics
  • Place of Presentation: Hanoi, BETONAM
  • Year and Date: 2010-12-13
• [Presentation] 理論 : 物性物理からの期待とコメント (2010)
  • Author(s): 遠山貴巳
  • Organizer: 日本物理学会2010年秋季大会領域5 シンポジウム
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-25