Analytic study of XY-Ising model

被引：0
|
作者：
Chen, HS [1 ]
Zhu, YL [1 ]
机构：
[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2000年 / 34卷 / 01期
关键词：
phase structure; statistical model; variational cumulant expansion;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We apply the variational cumulant expansion to study the phase transition of a two-dimensional coupled XY-Ising model. This model can describe several different systems with underlying continuous and Z(2) symmetries. We calculate the free energy, internal energy and specific heat to the third-order approximation with the trial action of two variational parameters. A comparison with Monte Carlo data is also presented.
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页码：179 / 180
页数：2
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