Free-energy variational approach for the classical anisotropic XY model in a crystal field

L. M. Castro; A. S. T. Pires; J. A. Plascak

首页> 外文期刊>Physical review, B. Condensed matter and materials physics >Free-energy variational approach for the classical anisotropic XY model in a crystal field

【24h】

Free-energy variational approach for the classical anisotropic XY model in a crystal field

机译：

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

A variational approach for the free energy is used to study the three-dimensional anisotropic XY model in the presence of a crystal field. The magnetization and the phase diagrams as a function of the parameters of the Hamiltonian are obtained. Some limiting results for isotropic XY and planar rotator models in two and three dimensions are analyzed and compared to previous results obtained from analytical approximations as well as from those obtained from more reliable approaches such as series expansion and Monte Carlo simulations. It is also shown that from this general variational approach some simple assumptions can drastically simplify the self-consistent implicit equations. The validity of the low-temperature region of this approach is analyzed and compared to Monte Carlo results as well.

著录项

来源
《Physical review, B. Condensed matter and materials physics》 |2007年第2期|024410.1-024410.8|共9页
作者
L. M. Castro; A. S. T. Pires; J. A. Plascak;
展开▼
作者单位

Departamento de Ciencias Exatas, Universidade Estadual do Sudoeste da Bahia, Estrada do Bem Querer Km04, CP 95, 45083-900 Vitoria da Conquista, BA, Brazil;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类固体物理学;
关键词
classical spin models; numerical simulation studies; static properties (order parameter; static susceptibility; heat capacities; critical exponents; etc.); phase transitions: general studies;

Free-energy variational approach for the classical anisotropic XY model in a crystal field

摘要

著录项

相关主题

期刊订阅