DERIVATION OF A RATE LAW FOR NONUNIFORM SYSTEMS AND CONTINUOUS ORDER PARAMETERS

被引：17

作者：

MARAIS, S ^{[1
]}

SALJE, E ^{[1
]}

机构：

[1] DEPT EARTH SCI,CAMBRIDGE CB2 3EQ,ENGLAND

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1991年 / 3卷 / 20期

关键词：

D O I：

10.1088/0953-8984/3/20/027

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A kinetic rate law for a partially conserved order parameter is derived in mean field theory of a continuous order parameter Q: (partial Q/partial t)(r) = -[(tau-1 + tau-2)/kT]{1 - - [tau-2/(tau-1 + tau-2)]sinh(xi-DELTA)/xi-DELTA} partial G/partial Q. The 'driving force' partial G/partial Q is related to the excess Gibbs free energy G, tau-1 and tau-2 are time constants and xi is the characteristic length scale of the conservation law. For Fourier components of Q with wavevectors short compared with 1/xi this rate law agrees with the rate law proposed by Salje in 1988.

引用

页码：3667 / 3670

页数：4

共 9 条

[1]

Binder K., 1979, MONTE CARLO METHODS, P204, DOI [10.1007/978-3-642-96483-1, DOI 10.1007/978-3-642-96483-1]

[2] A RATE-EQUATION FOR ATOMIC ORDERING IN MEAN FIELD-THEORY .2. GENERAL-CONSIDERATIONS [J].