Collective surface diffusion on a triangular lattice in presence of ordered phases

被引：15

作者：

Danani, A

Ferrando, R

Scalas, E

Torri, M

机构：

[1] Ist Nazl Fis Mat, I-16146 Genoa, Italy

[2] Univ Genoa, Dipartimento Fis, CNR, Ctr Fis Superfici & Basse Temp, I-16146 Genoa, Italy

[3] Univ Alberta, Inst Theoret, Dept Phys, Edmonton, AB T6G 2J1, Canada

来源：

SURFACE SCIENCE | 1998年 / 402卷 / 1-3期

关键词：

chemical diffusion; lattice gas models; ordered phases;

D O I：

10.1016/S0039-6028(97)01009-1

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：

Diffusion is studied in a two-dimensional gas of triangular symmetry with repulsive interactions. The collective diffusion coefficient, D-c, is calculated as the ratio of the average jump rate and the zero-wave-vector static structure factor (Darken approximation). The dependence of D-c on coverage, theta, is studied in both the disordered and ordered regions of the phase diagram. It is shown that, around the coverages of the perfect ordered phases (theta = 1/3 and 2/3), D-c changes of orders of magnitude in tiny B ranges. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：281 / 285

页数：5

共 17 条

[1] A NOTE ON THE CLUSTER VARIATION METHOD [J].