Diffusion of particles, adsorbed on a reconstructive surface

被引：0
|
作者：
Tarasenko, AA [1 ]
Jastrabìk, L [1 ]
机构：
[1] Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic
来源：
SURFACE SCIENCE | 2003年 / 532卷
关键词：
models of surface kinetics; non-equilibrium thermodynamics and statistical mechanics; surface diffusion;
D O I：
10.1016/S0039-6028(03)00413-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The influence of surface reconstruction on diffusion of adsorbed particles is investigated in the framework of simple two-position symmetrical model. Exact expressions for the free energy and diffusion coefficient are obtained neglecting the lateral interaction between the adsorbed particles. The critical behavior of the system is described by an anisotropic Ising spin model. The coverage dependencies of the chemical diffusion coefficient are calculated for different temperatures and interaction parameters. The dependencies show clearly the strong influence of the phase transitions, occurring in the system, on the particle migration. The chemical diffusion coefficient turns to zero at the critical points of the system. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：588 / 593
页数：6
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