Dynamical properties of random-field Ising model

被引：13

作者：

Sinha, Suman ^{[1
]}

Mandal, Pradipta Kumar ^{[2
]}

机构：

[1] Univ Calcutta, Dept Phys, Kolkata 700009, India

[2] Scottish Church Coll, Dept Phys, Kolkata 700006, India

来源：

PHYSICAL REVIEW E | 2013年 / 87卷 / 02期

关键词：

PHASE-TRANSITIONS; DOMAIN GROWTH; MONTE-CARLO; EQUILIBRATION; BEHAVIOR; STATE;

D O I：

10.1103/PhysRevE.87.022121

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Extensive Monte Carlo simulations are performed on a two-dimensional random field Ising model. The purpose of the present work is to study the disorder-induced changes in the properties of disordered spin systems. The time evolution of the domain growth, the order parameter, and the spin-spin correlation functions are studied in the nonequilibrium regime. The dynamical evolution of the order parameter and the domain growth shows a power law scaling with disorder-dependent exponents. It is observed that for weak random fields, the two-dimensional random field Ising model possesses long-range order. Except for weak disorder, exchange interaction never wins over pinning interaction to establish long-range order in the system. DOI: 10.1103/PhysRevE.87.022121

引用

页数：7

共 50 条

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