DYNAMIC PHASE-TRANSITION IN THE KINETIC ISING-MODEL UNDER A TIME-DEPENDENT OSCILLATING FIELD

被引:330
作者
TOME, T
DEOLIVEIRA, MJ
机构
[1] Instituto de Física, Universidade de Sao Paulo, 01 498 Sao Paulo, Sao Paulo
来源
PHYSICAL REVIEW A | 1990年 / 41卷 / 08期
关键词
D O I
10.1103/PhysRevA.41.4251
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We analyze within a mean-field approach the stationary states of the kinetic Ising model described by the Glauber stochastic dynamics and subject to a time-dependent oscillating external field. We have found that the magnetization of the system oscillates in time around a certain value that is zero at high temperatures or large field amplitudes and nonzero at low temperatures and small field amplitudes. The transition from one regime to the other, which corresponds to a spontaneous symmetry breaking, is found to be continuous for sufficiently small values of the field amplitudes. For higher values the transition becomes discontinuous and the system exhibits a dynamical tricritical point. © 1990 The American Physical Society.
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页码:4251 / 4254
页数:4
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