STUDY OF THE BLUME-EMERY-GRIFFITHS MODEL ON THE TRIANGULAR LATTICE BY THE CLUSTER-VARIATION METHOD

被引：34

作者：

GRIGELIONIS, G

ROSENGREN, A

机构：

[1] Department of Theoretical Physics, Royal Institute of Technology

来源：

PHYSICA A | 1994年 / 208卷 / 02期

关键词：

D O I：

10.1016/0378-4371(94)00051-4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The cluster-variation method (CVM) is used to investigate the phase diagram of the Blume-Emery-Griffiths (BEG) model on the triangular lattice. New topologies of the phase diagrams for K//Absolute value of J < -1 including three antiquadrupolar phases (in the ferromagnetic case; J > 0) and antiquadrupolar and ferrimagnetic phases (in the antiferromagnetic case; J < 0) are obtained. No previously reported reentrant phenomenon is found. Good accuracy of CVM is confirmed in comparison with the results of the analytic and Monte Carlo calculations.

引用

页码：287 / 299

页数：13

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