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

页码：639 / 650

页数：12

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