OPTICAL CONDUCTIVITY OF THE HUBBARD-MODEL IN THE STRONG-COUPLING REGIME

被引：1

作者：

FABIAN, J ^{[1
]}

机构：

[1] COMENIUS UNIV BRATISLAVA,FAC MATH & PHYS,DEPT THEORET PHYS,CS-84215 BRATISLAVA,SLOVAKIA

来源：

PHYSICS LETTERS A | 1994年 / 186卷 / 03期

关键词：

D O I：

10.1016/0375-9601(94)90352-2

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

On the basis of a diagrammatic technique for Hubbard operators we calculate the real part of the frequency-dependent conductivity in the Hubbard model on any-dimensional cubic lattice at finite temperatures. Results in the lowest non-vanishing order of the perturbation theory are presented for various values of the parameters U, t and band fillings. We explicitly check the sum rule within the perturbation order. The 1/T behavior of the Drude weight is observed for temperatures t much less than k T much less than U.

引用

页码：269 / 273

页数：5

共 22 条

[1] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1987, 235 (4793) :1196-1198

[2] EXPERIMENTAL CONSTRAINTS ON THE THEORY OF HIGH-TC SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1992, 256 (5063) :1526-1531

[3] LANDAU PARAMETERS OF ALMOST-LOCALIZED FERMI LIQUIDS [J].

BAERISWYL, D ;

GROS, C ;

RICE, TM .

PHYSICAL REVIEW B, 1987, 35 (16) :8391-8395

[4] INFLUENCE OF THE SPIN GAP ON THE NORMAL STATE TRANSPORT IN YBA2CU4O8 [J].

BUCHER, B ;

STEINER, P ;

KARPINSKI, J ;

KALDIS, E ;

WACHTER, P .

PHYSICAL REVIEW LETTERS, 1993, 70 (13) :2012-2015

[5] STATIC AND DYNAMIC PROPERTIES OF DOPED HUBBARD CLUSTERS [J].

DAGOTTO, E ;

MOREO, A ;

ORTOLANI, F ;

POILBLANC, D ;

RIERA, J .

PHYSICAL REVIEW B, 1992, 45 (18) :10741-10761

[6] MEAN-FIELD THEORIES OF CUPRATE SUPERCONDUCTORS - A SYSTEMATIC ANALYSIS [J].

GRILLI, M ;

KOTLIAR, BG ;

MILLIS, AJ .

PHYSICAL REVIEW B, 1990, 42 (01) :329-341

[7] THEORY OF STRONGLY CORRELATED ELECTRON-SYSTEMS ON THE BASIS OF A DIAGRAMMATIC TECHNIQUE FOR HUBBARD OPERATORS [J].

IZYUMOV, YA ;

LETFULOV, BM ;

SHIPITSYN, EV ;

BARTKOWIAK, M ;

CHAO, KA .

PHYSICAL REVIEW B, 1992, 46 (24) :15697-15711

[8]

IZYUMOV YA, 1989, STATISTICAL MECHANIC

[9] THEORY OF INSULATING STATE [J].

KOHN, W .

PHYSICAL REVIEW, 1964, 133 (1A) :A171-A181

[10] OPTICAL-SPECTRUM OF A HUBBARD CHAIN [J].

MALDAGUE, PF .

PHYSICAL REVIEW B, 1977, 16 (06) :2437-2446

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