On the valence bond solid in the presence of Dzyaloshinskii-Moriya interaction

被引：4
|
作者：
Liao, Chen-Nan [1 ]
Chern, Chyh-Hong
机构：
[1] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2011年 / 323卷 / 02期
关键词：
Condensed Matter-Strongly Correlated; Electron; Condensed Matter-Material Science; SUPERCONDUCTIVITY; LA2CUO4;
D O I：
10.1016/j.jmmm.2010.09.007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We examine the stability of the valence bond solid(VBS) phase against the Dzyaloshinskii-Moriya(DM) interaction in the bipartite lattice. We consider the VBS states in the AKLT model as well as the one in the Sandvik model in the 4 x L lattice. We found that the VBS is very stable against the DM interaction qin the AKLT model. There is no quantum phase transition in the AKLT+DM case. However, the VBS spin gap closes in the Sandvik model due to the DM interaction. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：232 / 236
页数：5
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