MIXED-SPIN ISING-MODEL ON THE BETHE LATTICE

被引：45

作者：

DASILVA, NR ^{[1
]}

SALINAS, SR ^{[1
]}

机构：

[1] UNIV SAO PAULO,INST FIS,BR-01498 SAO PAULO,BRAZIL

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.44.852

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We obtain the phase diagram of a ferromagnetic mixed Ising system, consisting of spin-1/2 and spin-S variables, on a Bethe lattice of coordination number z, with nearest-neighbor exchange interactions and single-ion terms. The problem is formulated as a discrete nonlinear map. There is a tricritical point for S integer and z greater-than-or-equal-to 5. In the infinite-coordination-number limit, we regain the results of an exact calculation for a Curie-Weiss version of the model.

引用

页码：852 / 855

页数：4

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