Study of Mechanism of High Temperature Superconductivity in Correlated Electron Systems using Quantum Simulation

2012 Fiscal Year Final Research Report

• Project/Area Number: 22540381
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: YANAGISAWA Takashi 独立行政法人産業技術総合研究所, 電子光技術研究部門, 上級主任研究員 (90344217)
• Co-Investigator(Kenkyū-buntansha): HASE Izumi 産業技術合研究所, 電子光技術研究部門, 主任研究員 (00357774)
• Project Period (FY): 2010 – 2012
• Keywords: 強相関電子系 / 計算物理

Research Abstract

We have investigated the electronic state of correlated electrons by using a quantum Monte Carlo method in order to clarify the mechanism of high temperature superconductivity. There is a serious problem, called the negative sign problem, in the method of

Research Products

• [Journal Article] Miyazaki, K. Yamaji: Strongly correlated electrons and high temperature superconductivity (2013)
  • Author(s): T. Yanagisawa, M. Miyazaki, K. Yamaji
  • Journal Title: Journal of Modern Physics, accepted for publication
• [Journal Article] Enhanced pair-correl -ation functions in the twodimensional Hubbard model (2013)
  • Author(s): T. Yanagisawa
  • Journal Title: New Journal of Physics Volume: 15 Pages: 33012
• [Journal Article] Electronic band structure of LaNiGa2 (2012)
  • Author(s): I. Hase, T. Yanagisawa
  • Journal Title: J. Physical Society of Japan Volume: 81 Pages: 103704
• [Journal Article] Renormalization of hopping integrals in coexistence phase of stripes and d-wave superconductivity in two- dimensional Hubbard model (2012)
  • Author(s): M. Miyazaki, K. Yamaji, T. Yanagisawa, K. Yonemitsu
  • Journal Title: Physics Procedia Volume: 27 Pages: 64-67
• [Journal Article] Chirality and vortices in multi- band superconductors (2012)
  • Author(s): T. Yanagisawa, Y. Tanaka, I. Hase, K. Yamaji
  • Journal Title: J. Physical Society of Japan Volume: 81 Pages: 024712
• [Journal Article] Unrestricted Hartree-Fock Analysis of Sr3-xCaxRu2O7 (2011)
  • Author(s): S. Koikegami, T. Yanagisawa, S. Koike
  • Journal Title: J. Physical Society of Japan Volume: 80 Pages: 124702
• [Journal Article] Superconducting Condensation Energy of the 2D Hubbard model in the large negative t' region (2011)
  • Author(s): K. Yamaji, T. Yanagisawa, M. Miyazaki, R. Kadono
  • Journal Title: J. Physical Society of Japan Volume: 80 Pages: 083702
• [Journal Article] Coexistence between checkerboard charge and striped spin in the two-dimensional Hubbard model (2010)
  • Author(s): M. Miyazaki, K. Yamaji and T. Yanagiswa
  • Journal Title: PhysicaC Volume: 470 Pages: 5919
• [Journal Article] ThreeDimensional Multi-Band d-p Model of Suprconductivity in Spin-Chain Ladder Cuprate (2010)
  • Author(s): S. Koikegami and T. Yanagisawa
  • Journal Title: J. Physical Society of Japan Volume: 79 Pages: 064701
• [Journal Article] Kosterlitz-Thouless Transition in the Two-Dimensional Hubbard Model Evidenced by Quamtum Monte Carlo Calculations of Susceptibilities (2010)
  • Author(s): T. Yanagisawa
  • Journal Title: J. Physical Society of Japan Volume: 79 Pages: 063708
• [Presentation] 多ギャップ超伝導体における複数の位相がくりひろげる新しい物理 (2013)
  • Author(s): 柳澤孝
  • Organizer: 日本物理学会年次大会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-26
• [Presentation] 二次元ハバードモデルの電子状態の数値的研究 (2013)
  • Author(s): 柳澤孝
  • Organizer: 計算物性物理学の新展開
  • Place of Presentation: 東京大学物性研究所
  • Year and Date: 2013-01-11
• [Presentation] Strongly Correlated Electrons and High Temperature Superconductivity, Theoretical and Experimental Meeting on Magnetism (2012)
  • Author(s): T. Yanagisawa
  • Organizer: Oxford University
  • Place of Presentation: Rutherford and Appleton University
  • Year and Date: 2012-06-28
• [Presentation] Numerical Study of High Temperature Superconductivity by Parallel Computing (2012)
  • Author(s): T. Yanagisawa
  • Organizer: International Workshop on Path-breaking Phase Science in Super -conductivity
  • Place of Presentation: 大阪府立博物館
  • Year and Date: 2012-01-14
• [Presentation] Fields, Universe and Superconductivity (2011)
  • Author(s): T. Yanagisawa
  • Organizer: International Workshop on "Super, Vacuum, Universe"
  • Place of Presentation: 東京理科大学
  • Year and Date: 2011-06-14
• [Presentation] 多成分超伝導体におけるカイラル状態、ナノ超伝導体における渦糸状態ワークショップ (2011)
  • Author(s): 柳澤孝
  • Organizer: 大阪府立大学
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2011-01-27
• [Presentation] Ginzburg-Landau theory of multi-band superconductivity and applications to Fe pnictides (2010)
  • Author(s): T. Yanagisawa, I. Hase, Y. Tanaka, K. Yamaji
  • Organizer: 22nd International Symposium on Superconductivity
  • Place of Presentation: つくば国際会議場
  • Year and Date: 2010-11-02
• [Book] orizons in World Physics 279 (2013)
  • Author(s): T. Yanagisawa
  • Publisher: Nova Science Publishers
• [Book] Magnetic Mechanism of Superconductivity in Copper-Oxide (2012)
  • Author(s): T. Yanagisawa
  • Publisher: Nova Science Publishers
• [Book] The Physics of Dilute Magnetic Alloys (2012)
  • Author(s): S. Koikegami, K. Odagiri, K. Yamaji, T. Yanagisawa, J. Kondo
  • Publisher: Cambridge University Press
• [Remarks]
  • URL: http://staff.aist.go.jp/t-yanagisawa/