Surface magnetism: phase transitions in quantum and classical models

被引：0
|
作者：
Neto, JC [1 ]
de Sousa, JR [1 ]
机构：
[1] Univ Amazonas, Dept Fis, Inst Ciencias Exatas, BR-69077000 Manaus, Amazonas, Brazil
来源：
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2003年 / 319卷
关键词：
surface magnetism; Heisenberg model; effective-field theory;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the phase diagram and multicritical behavior of the semi-infinite quantum spin 1/2 anisotropic Heisenberg and classical O(n) models. We use correlated effective field theory. The multicritical point Delta(c) and the crossover exponent phi are obtained as a function of the value n and anisotropy parameter. We have compared the results of systems with ferromagnetic and antiferromagnetic interactions. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：319 / 330
页数：12
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