Disordered phase of a two-dimensional Heisenberg model with S=1

被引：13

作者：

Moukouri, S ^{[1
]}

机构：

[1] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[2] Univ Michigan, Ctr Theoret Phys, Randall Lab 2477, Ann Arbor, MI 48109 USA

来源：

PHYSICS LETTERS A | 2006年 / 352卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.physleta.2005.11.064

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use the two-step density-matrix renormalization group method to study an anisotropic version of the J(1)-J(2) model with S = 1. We find a second order transition from a Neel Q = (pi, pi) phase to a disordered phase with a spin gap. This result which is contrasted to our previous finding on S = 1/2 systems suggests the importance of topological effects in the disordered phases of Heisenberg models. 2 (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：256 / 259

页数：4

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