PHASE-DIAGRAM OF THE EXTENDED HUBBARD-MODEL IN ONE SPATIAL DIMENSION

被引：80

作者：

CANNON, JW

FRADKIN, E

机构：

[1] Department of Physics, Univeristy of Illinois at Urbana-Champaign, Urbana, IL 61801

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.41.9435

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report results obtained for the phase diagram and critical behavior of the extended Hubbard model in one spatial dimension at half-filling. We show that umklapp scattering is responsible for the tricritical behavior. We calculate the critical exponents at the tricritical point, and along the critical line separating the charge- and spin-density-wave phases. In addition, using Monte Carlo simulations we estimate the position of the tricritical point to occur at approximately U=1.5 and V=3.1 in units of the hopping energy. © 1990 The American Physical Society.

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页码：9435 / 9443

页数：9

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