ASYMMETRIC HUBBARD CHAIN AT HALF-FILLING

被引：36

作者：

FATH, G

DOMANSKI, Z

LEMANSKI, R

机构：

[1] Institute of Theoretical Physics, University of Lausanne

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.52.13910

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ground-state phase diagram of the one-dimensional asymmetric Hubbard model at half-filling is studied by means of a perturbation expansion in the large-U limit and White's density matrix renormalization-group method for various values of the couplings. We argue that the introduction of asymmetry in the hopping parameters is a relevant perturbation for any repulsive U and drives the system into an ordered Neel antiferromagnet. The transition belongs to the Kosterlitz-Thouless universality class.

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页码：13910 / 13915

页数：6

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