1994 Fiscal Year Annual Research Report

強相関伝導系の物理 A03 強相関伝導系の理論

Research Project

Project/Area Number	06244104
Research Institution	Tokyo 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)	三宅和正大阪大学, 基礎工学部, 助教授 (90109265) 酒井治東北大学, 理学部, 助教授 (60005957) 山田耕作京都大学, 理学部, 助教授 (90013515) 町田一成岡山大学, 理学部, 助教授 (50025491) 長谷川彰新潟大学, 理学部, 教授 (40004329)
Keywords	重い電子系 / 超伝導 / 近藤効果 / 近藤絶縁体 / バンド理論 / 異常ホール効果
Research Abstract	1.重い電子系がバンド理論でどこ迄理解できるか、という課題については長谷川(新潟大)がCeRh_2、LaRh_2、YbGa_2、Thなどについて精力的に行い、大貫グループのドハースの実験と比較、CeRh_2を除きよい一致をみた。 2.重い電子系の超伝導については世界的に問題となっているUPt_3の超伝導の性格について町田(岡山大)のグループが研究を行った。町田は三重項の超伝導を提案し、vortex latticeの構造について詳しい解析を行った。また、異方的超伝導に関して斯波(東工大)が境界効果の研究を行い、これは来年度へ続く研究である。 3.近藤絶縁体については、三宅(阪大)が絶縁性の起源について新しいモデルを提案し、これは近い内実験グループによって検証実験が行われる。 4.山田(京大)が重い電子系の異常ホール効果について理論的説明を与えた。 5.内部構造のある磁性不純物の近藤効果について数値繰り込み群による研究が酒井(東北大)により行われて、近藤一重項と結晶場一重項の関係などが明らかにされた。 6.純理論的研究としては一次元近藤格子の基底状態と励起状態について上田(物性研)が、厳密解のある一次元強相関電子系についての研究を倉本(東北大)が行った。

Research Products
(41 results)

All Other

All Publications (41 results)

[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.63. 867-871 (1994)
[Publications] T.Sakai and H.Shiba: "Theory of ESR Absorption from the Ground State of NENP" Physica B. 201. 182-185 (1994)
[Publications] T.Ohyama and H.Shiba: "Spin Dynamics and Quantum Fluctuations in Quasi-One-Dimensional Triangular Antiferromagnets:Magnetic Field Effects" J.Phys.Soc.Jpn.63. 3454-3473 (1994)
[Publications] M.Matsumoto and H.Shiba: "On Boundary Effects in d-Wave Superconductors" J.Phys.Soc.Jpn.64(掲載予定). (1995)
[Publications] H.Shiba: "Kondo Effect in Superconductors:Numerical Renormalization Group Studies" J.Phys.Soc.Jpn.Suppl.(掲載予定). (1995)
[Publications] H.Shiba,T.Sakai,B.Luethi,W.Palme M.Sieling: "ESR Absorption from the Ground State in HAldane Systems:Theory and Experiment" Proc.of International Conference on MAgnetism. (掲載予定). (1995)
[Publications] T.Ohmi,K.Machida: "Non-unitary state in a heavy fermion superconductor UPt_3" Physica. B194-196. 2081-2082 (1994)
[Publications] T.Fujita,W.Aoyama,K.Machida,T.Ohmi: "Phase diagram in a heavy fermion superconductor UPt_3" Physica. B194-196. 2015-2016 (1994)
[Publications] K.Machida,T.Ohmi T.Fujita,M.Ozaki: "Phase diagram and superconducting properties of a heavy electron material UPt_3" Physica. B199-200. 183-185 (1994)
[Publications] T.Fujita,W.Aoyama K.Machida,T.Ohmi: "Phase diagram and vortex structures in UPt_3" J.Phys.Soc.Jpn.63. 247-255 (1994)
[Publications] Y.Hirano,T.Fujita K.Machida,T.Ohmi: "Phase diagrams in UPt_3 under various field orientations" J.Phys.Soc.Jpn.64. 210-221 (1994)
[Publications] H.Yamagami,Yasutami Takada,H.Yasuhara,A,Hasegawa,: "Improvement on the Correlated-Hartree-Fock Method and Application to Atoms" Phys.Rev.A. 49. 2354-2362 (1994)
[Publications] H.Yamagami,A,Hasegawa: "Fermi Surface of LaRu_2Ge_2 and CeRu_2Ge_2 by an LDA Band Theory" J.Phys.Soc.Jpn.63. 2290-2302 (1994)
[Publications] M.Higuchi,H.Yamagami,A.Hasegawa: "Fermi Surface of in CeRh_2" J.Phys.Soc.Jpn.63. 3014-3025 (1994)
[Publications] M.Higuchi,H.Yamagami,A.Hasegawa: "Fermi Surface of Th within Local-Density Functional Theory" J.Phys.Soc.Jpn.63. 4463-4474 (1994)
[Publications] M.Higuchi,A.Hasegawa: "Self-Consistent Relativistic Linear Augmented Plane Wave Method:Application to YbGa_2" J.Phys.Soc.Jpn.64. 掲載決定 (1995)
[Publications] Y.Onuki,A.Hasegawa: "Fermi Surfaces of Intermetallic Compounds" Handbook on the Physics and Chemistry of Rare Earths(North-Holland,Amsterdam,1995). 20. 掲載決定 (1995)
[Publications] 紺谷浩、山田耕作: "Theory of Anomalous Hall Effect in Heavy Fermion System" Journal of Physical Society of Japan. 63. 2627-2652 (1994)
[Publications] 岡部拓也: "Itinerant Ferromagnetism in Nickel" Jouranal of Physical Society of Japan. 63. 4155-4162 (1994)
[Publications] 山田耕作、加藤勝(M.Kato)、中野正浩(M.Nakano): "Unified View on Conductivity and Specific beat in DCNQI-Cu Systems" Journal of Physics:Condensed Matter. 7 No.4. (予定) (1995)
[Publications] K.Miyak 他1名: "Aspect of Spin-Charge Separation Dive to Antiferromagnetic Spin Fluctuations in Technically Nested 2D Metals" J.Phys.Soc.Jpn. 63. 2042-2046 (1994)
[Publications] A.Tokumitu 他1名: "Cross over from BCS to Local Pair Superconductivity in Two Dinension." Physica C. 235-240. 2367-2368 (1994)
[Publications] H.Kusunose 他1名: "Effect of Repulsion between Conduction Electrons in Two-Channel Kondo Problem;Numerical Renormalization-group Study" (投稿準備中).
[Publications] H.Ikeda 他1名: "Theory of Anisotropic Sericonductor of Heavy Electrons" (投稿準備中).
[Publications] Osamu Sakai: "Application of the Numerical Renormalization Group Method to the Hubbard Model in Infinite Dimensions." Solid State Communucations. 89. 307-311 (1994)
[Publications] Rikio Settai: "Observation of Heavy Hole State in CeSb." Journal of Physical Society of Japan 1994. 63. 3026-3035 (1994)
[Publications] 倉本義夫: "無限次元の強相関電子系-ハバ-ドモデルとその周辺-" 固体物理. 29. 777-787 (1994)
[Publications] Osamu Sakai: "Excitation Spectrum of the Impurity Anderson Model with Finite Orbital Degeneracy at Finite Temperatures." Physica,B. (印刷中).
[Publications] Yukihiro Shimizu: "Numerical Renormalization Group Study for 5f^2 Singlet System." Physica,B. (印刷中).
[Publications] Hiroshi Matsui: "Acoustic de Haas-van Alphen Effect of LaB_6." Journal of Physical Society of Japan. (投稿中).
[Publications] Yukihiro Shimizu: "Study on the Excitation Spectra of the Strongly Correlated Electron Systems based on the Numerical Renormalization Group Method.-Single Impurity and Infinite Dimensional Lattice Models-" Computational Physics as a New Frontier in Condensed Matter Research. (投稿中).
[Publications] 酒井治: "数値繰り込み群と強相関電子系の低エネルギー励起-一不純物および空間次元無限大格子系-" 日本物理学会誌. (投稿中).
[Publications] K.Ueda: "The Groundstate Phase Diagram of the Kondo Lattice Model" Physica B. 194-196. 255-256 (1994)
[Publications] K.Ueda: "Large Fermi Surface of the One-Dimensional Kondo-Lattice Model" Physical Review B. 50. 612-615 (1994)
[Publications] A.Lukyanchuk: "Magnetic Properties of Unconventional Superconductors" Superconductivity Review. (in press).
[Publications] Y.Kuramoto and J.Zittartz: "Solvable supersymmctric continuum model in arbitrary dimensions" Phys.Rev.Lett.72. 442-445 (1994)
[Publications] O.Sakai and Y.Kuramoto: "Application of the numerical renormalization group method to the Hubbard model in infinite dimensions" Solid State Commun.89. 307-311 (1994)
[Publications] Y.Kuramoto: "Role of supersymmetry in exactly soluble multi-component fermion models" Springer Series in Solid-State Sciences. 118. 36-42 (1994)
[Publications] N.Kawakami and Y.Kuramoto: "Hierarchical models with inverse-square interaction in harmonic confinement" Phys.Rev.B50. 4664-4670 (1994)
[Publications] 倉本義夫、酒井治: "無限次元の強相関電子系-ハバ-ド・モデルとその周辺" 固体物理. 10. 777-787 (1994)
[Publications] Y.Kato and Y.Kuramoto: "Exact solution of the Sutherland model with arbitrary internal symmetry" Phys.Rev.Lett.74. 1222-1225 (1995)

1994 Fiscal Year Annual Research Report

強相関伝導系の物理 A03 強相関伝導系の理論

Principal Investigator

斯波 弘行 東京工業大学, 理学部, 教授 (30028196)

Research Products

[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.63. 867-871 (1994)

[Publications] T.Sakai and H.Shiba: "Theory of ESR Absorption from the Ground State of NENP" Physica B. 201. 182-185 (1994)

[Publications] T.Ohyama and H.Shiba: "Spin Dynamics and Quantum Fluctuations in Quasi-One-Dimensional Triangular Antiferromagnets:Magnetic Field Effects" J.Phys.Soc.Jpn.63. 3454-3473 (1994)

[Publications] M.Matsumoto and H.Shiba: "On Boundary Effects in d-Wave Superconductors" J.Phys.Soc.Jpn.64(掲載予定). (1995)

[Publications] H.Shiba: "Kondo Effect in Superconductors:Numerical Renormalization Group Studies" J.Phys.Soc.Jpn.Suppl.(掲載予定). (1995)

[Publications] H.Shiba,T.Sakai,B.Luethi,W.Palme M.Sieling: "ESR Absorption from the Ground State in HAldane Systems:Theory and Experiment" Proc.of International Conference on MAgnetism. (掲載予定). (1995)

[Publications] T.Ohmi,K.Machida: "Non-unitary state in a heavy fermion superconductor UPt_3" Physica. B194-196. 2081-2082 (1994)

[Publications] T.Fujita,W.Aoyama,K.Machida,T.Ohmi: "Phase diagram in a heavy fermion superconductor UPt_3" Physica. B194-196. 2015-2016 (1994)

[Publications] K.Machida,T.Ohmi T.Fujita,M.Ozaki: "Phase diagram and superconducting properties of a heavy electron material UPt_3" Physica. B199-200. 183-185 (1994)

[Publications] T.Fujita,W.Aoyama K.Machida,T.Ohmi: "Phase diagram and vortex structures in UPt_3" J.Phys.Soc.Jpn.63. 247-255 (1994)

[Publications] Y.Hirano,T.Fujita K.Machida,T.Ohmi: "Phase diagrams in UPt_3 under various field orientations" J.Phys.Soc.Jpn.64. 210-221 (1994)

[Publications] H.Yamagami,Yasutami Takada,H.Yasuhara,A,Hasegawa,: "Improvement on the Correlated-Hartree-Fock Method and Application to Atoms" Phys.Rev.A. 49. 2354-2362 (1994)

[Publications] H.Yamagami,A,Hasegawa: "Fermi Surface of LaRu_2Ge_2 and CeRu_2Ge_2 by an LDA Band Theory" J.Phys.Soc.Jpn.63. 2290-2302 (1994)

[Publications] M.Higuchi,H.Yamagami,A.Hasegawa: "Fermi Surface of in CeRh_2" J.Phys.Soc.Jpn.63. 3014-3025 (1994)

[Publications] M.Higuchi,H.Yamagami,A.Hasegawa: "Fermi Surface of Th within Local-Density Functional Theory" J.Phys.Soc.Jpn.63. 4463-4474 (1994)

[Publications] M.Higuchi,A.Hasegawa: "Self-Consistent Relativistic Linear Augmented Plane Wave Method:Application to YbGa_2" J.Phys.Soc.Jpn.64. 掲載決定 (1995)

[Publications] Y.Onuki,A.Hasegawa: "Fermi Surfaces of Intermetallic Compounds" Handbook on the Physics and Chemistry of Rare Earths(North-Holland,Amsterdam,1995). 20. 掲載決定 (1995)

[Publications] 紺谷浩、山田耕作: "Theory of Anomalous Hall Effect in Heavy Fermion System" Journal of Physical Society of Japan. 63. 2627-2652 (1994)

[Publications] 岡部拓也: "Itinerant Ferromagnetism in Nickel" Jouranal of Physical Society of Japan. 63. 4155-4162 (1994)

[Publications] 山田耕作、加藤勝(M.Kato)、中野正浩(M.Nakano): "Unified View on Conductivity and Specific beat in DCNQI-Cu Systems" Journal of Physics:Condensed Matter. 7 No.4. (予定) (1995)

[Publications] K.Miyak 他1名: "Aspect of Spin-Charge Separation Dive to Antiferromagnetic Spin Fluctuations in Technically Nested 2D Metals" J.Phys.Soc.Jpn. 63. 2042-2046 (1994)

[Publications] A.Tokumitu 他1名: "Cross over from BCS to Local Pair Superconductivity in Two Dinension." Physica C. 235-240. 2367-2368 (1994)

[Publications] H.Kusunose 他1名: "Effect of Repulsion between Conduction Electrons in Two-Channel Kondo Problem;Numerical Renormalization-group Study" (投稿準備中).

[Publications] H.Ikeda 他1名: "Theory of Anisotropic Sericonductor of Heavy Electrons" (投稿準備中).

[Publications] Osamu Sakai: "Application of the Numerical Renormalization Group Method to the Hubbard Model in Infinite Dimensions." Solid State Communucations. 89. 307-311 (1994)

[Publications] Rikio Settai: "Observation of Heavy Hole State in CeSb." Journal of Physical Society of Japan 1994. 63. 3026-3035 (1994)

[Publications] 倉本義夫: "無限次元の強相関電子系-ハバ-ドモデルとその周辺-" 固体物理. 29. 777-787 (1994)

[Publications] Osamu Sakai: "Excitation Spectrum of the Impurity Anderson Model with Finite Orbital Degeneracy at Finite Temperatures." Physica,B. (印刷中).

[Publications] Yukihiro Shimizu: "Numerical Renormalization Group Study for 5f^2 Singlet System." Physica,B. (印刷中).

[Publications] Hiroshi Matsui: "Acoustic de Haas-van Alphen Effect of LaB_6." Journal of Physical Society of Japan. (投稿中).

[Publications] 酒井治: "数値繰り込み群と強相関電子系の低エネルギー励起-一不純物および空間次元無限大格子系-" 日本物理学会誌. (投稿中).

[Publications] K.Ueda: "The Groundstate Phase Diagram of the Kondo Lattice Model" Physica B. 194-196. 255-256 (1994)

[Publications] K.Ueda: "Large Fermi Surface of the One-Dimensional Kondo-Lattice Model" Physical Review B. 50. 612-615 (1994)

[Publications] A.Lukyanchuk: "Magnetic Properties of Unconventional Superconductors" Superconductivity Review. (in press).

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

[Publications] O.Sakai and Y.Kuramoto: "Application of the numerical renormalization group method to the Hubbard model in infinite dimensions" Solid State Commun.89. 307-311 (1994)

[Publications] Y.Kuramoto: "Role of supersymmetry in exactly soluble multi-component fermion models" Springer Series in Solid-State Sciences. 118. 36-42 (1994)

[Publications] N.Kawakami and Y.Kuramoto: "Hierarchical models with inverse-square interaction in harmonic confinement" Phys.Rev.B50. 4664-4670 (1994)

[Publications] 倉本義夫、酒井 治: "無限次元の強相関電子系-ハバ-ド・モデルとその周辺" 固体物理. 10. 777-787 (1994)

[Publications] Y.Kato and Y.Kuramoto: "Exact solution of the Sutherland model with arbitrary internal symmetry" Phys.Rev.Lett.74. 1222-1225 (1995)

斯波弘行東京工業大学, 理学部, 教授 (30028196)

[Publications] 倉本義夫、酒井治: "無限次元の強相関電子系-ハバ-ド・モデルとその周辺" 固体物理. 10. 777-787 (1994)