Metal-insulator transition and charge ordering in the extended Hubbard model at one-quarter filling

被引：43

作者：

Calandra, M

Merino, J

McKenzie, RH

机构：

[1] Max Planck Inst Festkorperforsch, D-70506 Stuttgart, Germany

[2] Univ Queensland, Dept Phys, Brisbane, Qld 4072, Australia

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.66.195102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study, with exact diagonalization, the zero temperature properties of the quarter-filled extended Hubbard model on a square lattice. We find that increasing the ratio of the intersite Coulomb repulsion, V, to the bandwidth drives the system from a metal to a charge ordered insulator. The evolution of the optical conductivity spectrum with increasing V is in agreement with the observed optical conductivity of several layered molecular crystals with the theta and beta" crystal structures.

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页码：1 / 5

页数：5

相关论文

共 45 条

[1] FINITE SIZE EFFECTS IN PHASE-TRANSITIONS [J].

BREZIN, E ;

ZINNJUSTIN, J .

NUCLEAR PHYSICS B, 1985, 257 (06) :867-893

[2] Charge ordering in the TMTTF family of molecular conductors [J].

Chow, DS ;

Zamborszky, E ;

Alavi, B ;

Tantillo, DJ ;

Baur, A ;

Merlic, CA ;

Brown, SE .

PHYSICAL REVIEW LETTERS, 2000, 85 (08) :1698-1701

[3]

CLAY RT, CONDMAT0112278

[4] 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

[5] CORRELATED ELECTRONS IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].

DAGOTTO, E .

REVIEWS OF MODERN PHYSICS, 1994, 66 (03) :763-840

[6] Optical properties of β"-(ET)2SF5CH2CF2SO3:: A layered molecular superconductor with large discrete counterions [J].

Dong, J ;

Musfeldt, JL ;

Schlueter, JA ;

Williams, JM ;

Nixon, PG ;

Winter, RW ;

Gard, GL .

PHYSICAL REVIEW B, 1999, 60 (06) :4342-4350

[7] ELECTRODYNAMICS OF THE ORGANIC SUPERCONDUCTORS KAPPA-(BEDT-TTF)(2)CU(NCS)(2) AND KAPPA-(BEDT-TTF)(2)CU[N(CN)(2)]BR [J].

DRESSEL, M ;

KLEIN, O ;

GRUNER, G ;

CARLSON, KD ;

WANG, HH ;

WILLIAMS, JM .

PHYSICAL REVIEW B, 1994, 50 (18) :13603-13615

[8] Theory of the optical conductivity of (TMTSF)(2)PF6 in the midinfrared range [J].

Favand, J ;

Mila, F .

PHYSICAL REVIEW B, 1996, 54 (15) :10425-10429

[9]

HAGEL J, COMMUNICATION

[10] GENERALIZED WIGNER LATTICES IN ONE DIMENSION AND SOME APPLICATIONS TO TETRACYANOQUINODIMETHANE (TCNQ) SALTS [J].

HUBBARD, J .

PHYSICAL REVIEW B, 1978, 17 (02) :494-505

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