CRITICAL-DYNAMICS OF ONE-DIMENSIONAL LONG-RANGE EXCHANGE MODELS

被引：1
|
作者：
MOREIRA, AG
DASILVA, JKL
SABARRETO, FC
机构：
[1] Departamento de Fisica, Instituto de Ciencias Exatas, Universidade Federal de Minas Gerais, 30161-970 Belo Horizonte
来源：
PHYSICAL REVIEW B | 1993年 / 48卷 / 01期
关键词：
D O I：
10.1103/PhysRevB.48.289
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
One-dimensional kinetic Ising models with long-range exchange of two spins with opposite signs are considered. The exchange probability is a power-law function of the distance between exchanged spins. Rigorous lower bounds for the dynamical exponent z axe obtained from the initial response and the scaling hypothesis of the relaxation time. The dependence of the z exponent on the maximal exchange distance and on the exchange probability is studied. Nonuniversal behavior in the ferromagnetic model with two different alternating coupling constants is found. The z exponent is also obtained from the domain-wall argument.
引用
收藏
页码：289 / 296
页数：8
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