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.

引用

页码：179 / 180

页数：2

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