Tracer diffusion of dimers on correlated heterogeneous surfaces

被引:0
|
作者
Bulnes, F
Bustingorry, S
Ramirez-Pastor, AJ
机构
[1] Univ Nacl San Luis, CONICET, Dept Fis, RA-5700 San Luis, Argentina
[2] Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
关键词
Monte Carlo simulation; heterogeneous surfaces; dimer diffusion;
D O I
10.1016/j.physa.2003.09.019
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The diffusion of a single dimer adsorbed on highly correlated heterogeneous substrates is studied through Monte Carlo simulations. The topography has been characterized by patches of weak and strong adsorbing sites, arranged in a chessboard-like ordered structure. The time behavior of the mean-square displacement of the dimer is analyzed for different temperatures and patch size. Based on this analysis, a possible method for the characterization of the correlated heterogeneous topography from dimer diffusion measurements is discussed. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:409 / 414
页数:6
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