The phase diagram of the 2D Ising model with anisotropic next-nearest-neighbor and four-spin interactions

被引：18
|
作者：
Wang, FG [1 ]
Suzuki, M [1 ]
机构：
[1] SHANGHAI JIAO TONG UNIV,DEPT APPL PHYS,SHANGHAI 200030,PEOPLES R CHINA
来源：
PHYSICA A | 1996年 / 230卷 / 3-4期
关键词：
Ising model; eight-vertex model; free-fermion condition;
D O I：
10.1016/0378-4371(96)00116-1
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In the present paper, the two-dimensional Ising model with anisotropic nearest-neighbor, next-nearest-neighbor and four-spin interactions has been studied. The ground states and energy of the model have been obtained. The model is equivalent to an eight-vertex model on its dual lattice. In some special cases, the model can be solved exactly as a zero-field eight-vertex model or a free-fermion model. Explicit phase diagrams are obtained exactly.
引用
收藏
页码：639 / 650
页数：12
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