Diffusion of interacting lattice gases on heterogeneous surfaces with simple topographies

Collective diffusion coefficients are studied for heterogeneous bivariate trap surfaces with different topographies. The topography is shown to affect strongly the coverage dependence and Arrhenius behavior of diffusion coefficients. The fluctuation and Kubo-Green methods are in strong disagreement,...

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Bibliographic Details
Published inSurface science Vol. 366; no. 1; pp. 185 - 192
Main Authors Uebing, C, Pereyra, V, Zgrablich, G
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 10.10.1996
Amsterdam Elsevier Science
New York, NY
Subjects
Condensed matter: structure, mechanical and thermal properties
Diffusion; interface formation
Exact sciences and technology
Heterogeneous surfaces
Physics
Solid surfaces and solid-solid interfaces
Surface diffusion
Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)
Heterogeneous surfaces
Surface diffusion
Theoretical study
Heterogeneous surface
Diffusion coefficient
Topography
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Summary:Collective diffusion coefficients are studied for heterogeneous bivariate trap surfaces with different topographies. The topography is shown to affect strongly the coverage dependence and Arrhenius behavior of diffusion coefficients. The fluctuation and Kubo-Green methods are in strong disagreement, which is attributed to the failure of the former when the probe size is of the order of the applicable scale length for the lattice gas.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(96)00803-5