ORDERING AND PHASE-TRANSITIONS IN RANDOM-FIELD ISING SYSTEMS

被引：54

作者：

MARITAN, A ^{[1
]}

SWIFT, MR ^{[1
]}

CIEPLAK, M ^{[1
]}

CHAN, MHW ^{[1
]}

COLE, MW ^{[1
]}

BANAVAR, JR ^{[1
]}

机构：

[1] POLISH ACAD SCI,INST PHYS,PL-02668 WARSAW,POLAND

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.67.1821

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An exact analysis of the Ising model with infinite-range interactions in a random field and a local mean-field theory in three dimensions is carried out leading to a phase diagram with several coexistence surfaces and lines of critical points. Our results show that the phase diagram depends crucially on whether the distribution of random fields is symmetric or not. Thus, Ising-like phase transitions in a porous medium (the asymmetric case) are in a different universality class from the conventional random-field model (symmetric case).

引用

页码：1821 / 1824

页数：4

共 24 条

[21] STRUCTURE AND SELF-SIMILARITY OF SILICA AEROGELS [J].