Ground states of the Falicov-Kimball model with hybridization

被引：15

作者：

Sarasua, LG ^{[1
]}

Continentino, MA ^{[1
]}

机构：

[1] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.69.073103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We obtain exact ground states for the spinless Falicov-Kimball model with hybridization in one dimension (d=1). Ground-state energies and their corresponding wave functions are given for a restricted region of the parameter space in the limit of strong interactions for the half-filling condition. We find that the ground states possess a diagonal long range order and constitute a condensation of excitons in a zero momentum state. On the other hand, the correlation function A=<d(i)(dagger)f(i)> is purely imaginary, indicating that the ground state does not exhibit spontaneous ferroelectricity.

引用

页数：4

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