Random field Ising model in a random graph

被引：8

作者：

Doria, F. F. ^{[1
]}

Erichsen, R., Jr. ^{[1
]}

Dominguez, D. ^{[1
]}

Gonzalez, Mario ^{[2
]}

Magalhaes, S. G. ^{[3
]}

机构：

[1] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

[2] Univ Estatal Milagro, Milagro, Guayas, Ecuador

[3] Univ Fed Fluminense, Inst Fis, BR-24210346 Niteroi, RJ, Brazil

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2015年 / 422卷

关键词：

Disordered systems; Random field Ising model; Finite connectivity; BETHE LATTICE; SPIN-GLASSES; FINITE CONNECTIVITY; TRICRITICAL POINTS; STATE; INSTABILITY; SYMMETRY; SYSTEMS;

D O I：

10.1016/j.physa.2014.12.002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Random Field Ising Model (RFIM) following bimodal and Gaussian distributions for the RF is investigated using a finite connectivity technique. We focused on determining the order of the phase transition as well as the existence of a tricritical point as a function of the connectivity c for both types of RF distribution. Our results indicate that for the Gaussian distribution the phase transition is always second-order. For the bimodal distribution, there is indeed a tricritical point. However, its location is strongly dependent on c. The tricritical point is suppressed below a certain minimum value of connectivity. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：58 / 65

页数：8

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