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1993 Fiscal Year Annual Research Report

計算物理学-物性研究における新展開-A02相関の強い量子系

Research Project

Project/Area Number 04231105
Research InstitutionTokyo Institute of Technology

Principal Investigator

斯波 弘行  東京工業大学, 理学部, 教授 (30028196)

Co-Investigator(Kenkyū-buntansha) 坂井 徹  姫路工業大学, 理学部, 助手 (60235116)
倉本 義夫  東北大学, 理学部, 教授 (70111250)
酒井 治  東北大学, 理学部, 助教授 (60005957)
永長 直人  東京大学, 工学部, 助教授 (60164406)
安藤 恒也  東京大学, 物性研究所, 教授 (90011725)
Keywords量子モンテカルロ法 / 強相関電子系 / 一次元量子系 / スーパーコンピューター / 二次元電子系
Research Abstract

本年度は最終年度であるので、今迄に導入したワークステーションとスーパーコンピューターを活用し、これ迄の研究のまとめと新しい展開を行った。
磁場中の量子細線の電子状態の研究が安藤と吉岡によって行われ、特に吉岡は「非朝永-Luttinger 液体状態」が出現しうることを示した。
数値繰り込み群の方法は本重点領域によって大きい進展があった。内部構造が重要な希土類の近藤効果(酒井)、超伝導体中の近藤効果(斯波、酒井)に続き、本年は無限大次元ハバード・モデルへの応用が始まった。(酒井、倉本)
量子モンテ・カルロ法については、二次元の強相関系の研究(今田)や無限大次元ハバード・モデルの磁化過程への応用(佐宗)がなされた。
変分モンテ・カルロ法の発展としては、近藤格子への応用がなされた。(岡部)
第1年度から続いている本グループの大きい課題としてはHaldane ギャップ問題への厳密対角化法による研究がある。動的相関関数の詳細な研究(高橋)、隠れたストリング・オーダーの研究(坂井、高橋)、ESRの理論的研究(坂井、斯波)などがなされた。
その他、コンピューターを利用した「一次元超対称t-Jモデル」の研究(倉本、横山)、アブリコソフ構造の数値シミュレーション(永長)なども当グループの成果である。
これらの研究は平成5年度内に開かれた、谷口シンポジウムなどの国際会議のほか、平成6年度に開かれる「磁気国際会議」、「日独セミナー」、「サンタ・バーバラ・ワークショップ」において招待講演として発表されることになっている。

  • Research Products

    (67 results)

All Other

All Publications (67 results)

  • [Publications] Y.Ohashi and H.Shiba: "Pairing and Depairing Effects of Antiferromagnetic Spin Fluctuations in High-Tc Superconductivity" J.Phys.Soc.Jpn.62. 2783-2802 (1993)

  • [Publications] O.Sakai,Y.Shimizu,H.Shiba and K.Satori: "Numerical Renormalization Group Study of Magnetic Impurities in Superconductors II" J.Phys.Soc.Jpn.62. 3181-3197 (1993)

  • [Publications] T.Nikuni and H.Shiba: "Quantum Fluctuations and Magnetic Structures of CsCuCl_3 in High Magnetic Field" J.Phys.Soc.Jpn.62. 3268-3276 (1993)

  • [Publications] T.Ohyama and H.Shiba: "Nonlinear Excitations in Quasi-One-Dimensional Triangular Antiferromagnets" J.Phys.Soc.Jpn.62. 3277-3293 (1993)

  • [Publications] A.E.Jacobs,T.Nikuni and H.Shiba: "Theory of MAgnetic Structures of CsCuCl_3 in Transverse MAgnetic Field" J.Phys.Soc.Jpn.62. 4066-4080 (1993)

  • [Publications] 斯波弘行,酒井治: "近藤効果とエネルギー・ギャップの競合-超伝導体・半導体など-" 固体物理. 28. 926-932 (1993)

  • [Publications] N.Kaneko: "The Uniform and Staggered Magnetization and Intersite Interaction of the Two-Imputity Anderson Model" Physica. B186-188. 888-890 (1993)

  • [Publications] O.Sakai: "Excitation Spectra of Two-Impurity and Multi-channel Kondo Systems by the Numerical Renormalozation Group Method" Physica. B186-188. 323-327 (1993)

  • [Publications] Y.Shimizu: "Excitation Spectra of the Two-channel Anderson Model" Physica. B186-188. 891-894 (1993)

  • [Publications] K.Takegahara: "Magnetic Impurity in Nonmetallic Systems" Physica. B186-188. 381-383 (1993)

  • [Publications] H.Shiba: "Numerical Renormalization group Study of the Kondo Effect in Superconductors" Physica. B186-188. 239-241 (1993)

  • [Publications] O.Sakai: "Numerical Renormalization Group Study of Magnetic Impurities in Superconductors.II.Dynamical Excitation Spectra and Spatial Variation of the Order Parameter" J.Phys.Soc.Jpn.62. 3181-3197 (1993)

  • [Publications] O.Sakai: "Application of the Numerical Renormalization Group Method to the Hubbard Model in Infinite Dimension" Solid State Commun.89(in press). (1994)

  • [Publications] R.Takayama: "Excitation Spectra of the Anderson Model with Coulomb Interaction Between Localized and Conduction Electrons" Physica. B186-188. 915-917 (1994)

  • [Publications] M.Takeshize: "Dynamical Screening by d-Electron in Optical and Virtual Excitation in f-Electron Systems." Jpn.J.Appl.Phys.Series 8. 129-138 (1993)

  • [Publications] Y.Kaneta: "Electronoc band Structures of Rare Earth Monopnictides under Strain and Presure" Physica. B186-188. 156-158 (1993)

  • [Publications] O.Sakai: "4f-Energy Levels in Band Theory and the Fermi Surface Structure of La and Ce Compounds" Physica. B186-188. 179-181 (1993)

  • [Publications] T.Kasuya: "Pressure Effect on LaSb and CeAs" J.Phys.Soc.Jpn.62. 411-415 (1993)

  • [Publications] Y.Kuramoto: "Competition between CEF singlet and Kondo Singlet as origin of weak antiferromagnetism and resistivity anomaly" Transport and Thermal Properties of f-Electron systems,(G.Oomi et al.eds,Plenum Pub.). 237-246 (1993)

  • [Publications] Y.Honda,Y.Kuramoto and T.Watanabe: "Effects of cyclic 4-spin exchange on magnetic properties of the CuO_2 plane" Phys.Rev.B. 47. 11329-11336 (1993)

  • [Publications] Y.Kuramoto: "Supersymmetric long-range t-J model as a new canonical model for strongly correlated fermions" Physica B. 186-188. 831-833 (1993)

  • [Publications] Y.Kuramoto: "Electronic properties ans their system-size dependence in strongly correlated systems" New Functionality Materials,Volume C(T.Tsuruta et al.eds.,Elsevier Science Pub.,Amsterdam). 57-62 (1993)

  • [Publications] T.Inoshita,A.Shimizu,Y.Kuramoto and Sasaki: "Correlated electron transport through a quantum dot:The multilevel effect" Phys.Rev.B. 48. 14725-14728 (1993)

  • [Publications] Y.Kuramoto and J.Zittartz: "Solvable supersymmetric continuum model in arbitary dimensions" Phys.Rev.Lett.72. 442-445 (1994)

  • [Publications] T.Saso and J.Ogura: "Kondo Insulator--1/N and Quantum Monte Carlo Studies" Physica B. 186-188. 372-374 (1993)

  • [Publications] J.Ogura and T.Saso: "Magnetic Impurity in Insulators with Small Energy Gap" J.Phys.Soc.Jpn.62. 4364-4372 (1993)

  • [Publications] T.Saso and T.Hayashi: "Magnetization Curve of the Infinite-Dimensional Hubbard Model" J.Phys.Soc.Jpn.63. 399-402 (1994)

  • [Publications] Kenn Kubo: "Excited states and the thermodynamics of a fully frustrated quantum spin chain" Physical Review. B48. 10552-10555 (1993)

  • [Publications] Kenn Kubo: "The Quantum Transfer Matrix and Its Application to Quantum Spin Chains" “Quantum Monte Carlo Methods in Condensed Matter Physics" ed.M.Suzuki.,World Scientific Publishers. 113-129 (1993)

  • [Publications] Hiroshi Watanabe: "Namerical Diagonalization Study of an S=1/2 Ladder Model with Open boundary Conditions" Physical Review B. (投稿中).

  • [Publications] T.Tsuchiya: "Electron-Phonon Interaction in GaAs/AlAs Superlattices" Physical Review B. 47. 7240-7252 (1993)

  • [Publications] T.Ando: "Valley Mixing in Short-Period Supperlattices and Interface Matrix" Physical Review B. 47. 9621-9628 (1993)

  • [Publications] H.Ajiki: "Electronic States of Carbon Nantubes" J.Physical Society of Japan. 62. 1255-1266 (1993)

  • [Publications] H.Ajiki: "Magnetic Properties of Carbon Nanotubes" J.Physical Society of Japan. 62. 2470-2480 (1993)

  • [Publications] T.Tsuchiya: "Mobility Enhancement in Quantum Wells by Electronic-State Modulation" Physical Review B. 48. 4599-4603 (1993)

  • [Publications] T.Suzuki: "Subband Structure of Quantum Wires in High Magnetic Fields" J.Physical Society of Japan. 62. 2986-2989 (1993)

  • [Publications] T.Sakai: "Anisotropic S=1 Antiferromagnetic Heisenberg Chain in a Magnetic Field" J.Phys.Soc.Jpn.62. 750-758 (1993)

  • [Publications] M.Takahashi: "Elementary Excitations of an Anisotropic Spin-1 Chain" Phys.Rev.B. 48. 311-316 (1993)

  • [Publications] 坂井徹: "磁場中のハルデン磁性体" 固体物理. 28. 399-406 (1993)

  • [Publications] M.Takahashi: "Analytical and Numerical Investigations of Spin Chains" Prog.Theor.Phys.91. 1-15 (1994)

  • [Publications] T.Sakai: "Numerical Study of the String Order in S=1 Antiferromagnetic Heisenberg Chain" J.Phys.Soc.Jpn.(in press). (1994)

  • [Publications] H.Nakano: "Quantum Heisenberg Chain with Long-Range Ferromagnetic Interactions at Low Temperature" J.Phys.Soc.Jpn.(in press). (1994)

  • [Publications] Masatoshi Imada: "Spin Peierls Fluctuation and Nonlinear Excitations in One-Dimensional Systems" Progress of Theoretical Physics Supplement. No.113. 203-213 (1993)

  • [Publications] Masatoshi Imada: "Two Types of Mott Transitions" Journal of the Physical Society of Japan. Vol.62. 1105-1108 (1993)

  • [Publications] Nobuyuki Katoh and Masatoshi Imada: "Phase Diagram of S=1/2 Antiferromagnetic Heisenberg Model on a Dimerized Square Lattice" Journal of the Physical Society of Japan. Vol.62. 3728-3740 (1993)

  • [Publications] Nobuo Furukawa and Masatoshi Imada: "Metal-insulator transition in the two-dimensional Hubbard model" Physica B. 186-188. 931-934 (1993)

  • [Publications] Masatoshi Imada: "Spin-Peierls fluctuation and dimerization:possible mechanism of superconductivity" Physica B. 186-188. 822-827 (1993)

  • [Publications] Masatoshi Imada: "Theory of Antiferromagnetic Correlations in High-T_c Cuprates" Journal of the Physical Society of Japan. Vol.63. (1994)

  • [Publications] Y.Kato & N.Nagaosa: "Monte Carlo Simulation of 2D Flux Line Lattice Melting" Phys.Rev.B. 48. 7383-7391 (1993)

  • [Publications] M.Ubbens,P.A.Lee & N.Nagaosa: "Superfluidity in the 2D gauge field model:a renormalization analysis" Phys.Rev.B. 48. 13762-13773 (1993)

  • [Publications] N.Nagaosa & T.Ogawa: "High-Density Electron-Hole System in One-Dimension" Solid State Communications. 88. 295-299 (1993)

  • [Publications] N.Nagaosa: "Confinement-Deconfinement Transition in Dissipative Gauge Field" Phys.Rev.Lett.71. 4210-4213 (1993)

  • [Publications] A.Furusaki & N.Nagaosa: "Kondo Effect in a Tomonaga-Luttirger Liquid" Phys.Rev.Lett.72. 892-895 (1994)

  • [Publications] Y.Kato & A.Tanaka: "Numerical Study of the S=1 Antiferromagnetic Spin Chain with Bond Alternation" J.Phys.Soc.Jpn.63(印刷中). (1994)

  • [Publications] Osamu Narikiyo and Daijiro Yoshioka: "Excitation Spectrum of a Double Quantum Well System in a strong Magnetic Field" J.Phys.Soc.Japan. 62. 1612-1623 (1993)

  • [Publications] Daijiro Yoshioka: "Canonical Calculation of Orbital Magnetism of a 2-D Quantum Dot" J.Phys.Soc.Japan. 62. 3198-3202 (1993)

  • [Publications] Daijiro Yoshioka and Masao Ogata: "Non Tomonaga-Luttinger-Liquid Behavior of the Ground State of Model One-Dimensional Electron Systems" J.Phys.Soc.Japan. 62. 2990-2993 (1993)

  • [Publications] T.Sakai and M.Takahashi: "Anisotropic S=1 Antiferromagnetic Heisenberg Chain in a Magnetic Field" J.Phys.Soc.Jpn.62. 750-758 (1993)

  • [Publications] 坂井徹,高橋實: "磁場中のハルデン磁性体" 固体物理. 28. 399-406 (1993)

  • [Publications] T.Sakai: "S=1 Antiferromagnetic Heisenberg Chain in a Magnetic Field" Computer Aided Innovation of New Materials. 2. 421-424 (1993)

  • [Publications] T.Sakai and M.Takahashi: "Numerical Study of the String Order in S=1 Antiferromagnetic Heisenberg Chain" J.Phys.Soc.Jpn.63. 755-761 (1994)

  • [Publications] T.Sakai and H.Shiba: "Numerical Study of a Model for NENP:One-Dimensional S=1 Antiferromagnet in a Staggered Field" J.Phys.Soc.Jpn.(発表予定)63. (1994)

  • [Publications] T.Sakai and H.Shiba: "Theory of ESR Absorption from the Ground State of NENP" Proceedings of ISSP Symposium on Frontiers in High Magnetic Fields. (発表予定).

  • [Publications] N.Ito,M.Kikuchi and Y.Okabe: "Recycle of Random Sequences" Int.J.Mod.Phys.C. 4. 569-590 (1993)

  • [Publications] H.Otsuka: "Ground-State Properties of the Half-filled Kondo Lattice Model:A Numerical Study" Phys.Rev.B. 49. 1557-1563 (1994)

  • [Publications] 安藤恒也: "岩波講座「現代の物理学18巻」" 岩波書店, 91-156 (1993)

  • [Publications] Y.Okabe,M.Kikuchi and K.Niizeki: "Computer Simulation Studies in Condensed Matter Physics V 分担執筆部分標題 Application of Finite-Size Scaling to Phase Transitions and Localization-Delocalization Transitions 分担執筆ページ5-17" Springer, 197 (1993)

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Published: 1995-02-08   Modified: 2016-04-21  

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