The spin-1 anisotropic Heisenberg antiferromagnet on a square lattice at low temperatures

被引：27

作者：

Pires, A. S. T. ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Fis, ICEx, BR-30123970 Belo Horizonte, MG, Brazil

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2011年 / 323卷 / 15期

关键词：

Heisenberg model; Antiferrromagnet; Quantum phase transition; MODEL;

D O I：

10.1016/j.jmmm.2011.02.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper we study the low temperature behavior of the quantum S=1 Heisenberg antiferromagnet with exchange and single-site anisotropies on the square lattice. The properties of the model change drastically as the single-site anisotropy D varies from very small to very large values. A quantum phase transition takes place at a critical value D=D-C. We study the low D phase using a self-consistent harmonic approximation and a schematic phase diagram is proposed. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1977 / 1979

页数：3

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