DISORDER VS INTERACTION IN THE HUBBARD-MODEL - PHASE-DIAGRAM IN INFINITE DIMENSIONS

被引：18

作者：

JANIS, V ^{[1
]}

ULMKE, M ^{[1
]}

VOLLHARDT, D ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST FESTKORPERFORSCH, D-52425 JULICH, GERMANY

来源：

EUROPHYSICS LETTERS | 1993年 / 24卷 / 04期

关键词：

D O I：

10.1209/0295-5075/24/4/009

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influence of local disorder on the thermodynamics of interacting electrons is studied within the infinite-dimensional disordered Hubbard model. Using a finite-temperature quantum Monte Carlo method, the averaged local moment and staggered susceptibility are calculated and the magnetic phase diagram at half-filling is constructed. From the averaged compressibility in the paramagnetic and antiferromagnetic phase we determine the metal-insulator transitions of the system. A rich transition scenario is revealed. Quite unexpectedly the disorder is found to stabilize the magnetic order in the strong-coupling limit.

引用

页码：287 / 292

页数：6

共 21 条

[1]

CAFFAREL M, PREPRINT

[2]

EMERY VJ, 1993, CORRELATED ELECTRON

[3] STRONGLY CORRELATED SYSTEMS IN INFINITE DIMENSIONS AND THEIR ZERO DIMENSIONAL COUNTERPARTS [J].

GEORGES, A ;

KOTLIAR, G ;

SI, QM .

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 1992, 6 (5-6) :705-730

[4] NUMERICAL-SOLUTION OF THE D=INFINITY HUBBARD-MODEL - EVIDENCE FOR A MOTT TRANSITION [J].

GEORGES, A ;

KRAUTH, W .

PHYSICAL REVIEW LETTERS, 1992, 69 (08) :1240-1243

[5] HUBBARD-MODEL IN INFINITE DIMENSIONS [J].

GEORGES, A ;

KOTLIAR, G .

PHYSICAL REVIEW B, 1992, 45 (12) :6479-6483

[6]

GEORGES A, IN PRESS Z PHYS B

[7]

GEORGES A, LPTENS9224 PREPR

[8] MONTE-CARLO METHOD FOR MAGNETIC-IMPURITIES IN METALS [J].

HIRSCH, JE ;

FYE, RM .

PHYSICAL REVIEW LETTERS, 1986, 56 (23) :2521-2524

[9] COMPREHENSIVE MEAN FIELD-THEORY FOR THE HUBBARD-MODEL [J].

JANIS, V ;

VOLLHARDT, D .

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 1992, 6 (5-6) :731-747

[10] COUPLING OF QUANTUM DEGREES OF FREEDOM IN STRONGLY INTERACTING DISORDERED ELECTRON-SYSTEMS [J].

JANIS, V ;

VOLLHARDT, D .

PHYSICAL REVIEW B, 1992, 46 (24) :15712-15715

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