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

Danani, A, Ferrando, R, Scalas, E and Torri, M (1998) Collective surface diffusion on a triangular lattice in presence of ordered phases. Surface Science, 402-4. pp. 281-285. ISSN 0039-6028

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Abstract

Diffusion is studied in a two-dimensional gas of triangular symmetry with repulsive interactions. The collective diffusion coefficient, Dc, is calculated as the ratio of the average jump rate and the zero-wave-vector static structure factor (Darken approximation). The dependence of Dc on coverage, θ, 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 (θ=1/3 and 2/3), Dc changes of orders of magnitude in tiny θ ranges.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Mathematics
Subjects: Q Science > QA Mathematics > QA0273 Probabilities. Mathematical statistics
Q Science > QC Physics > QC0170 Atomic physics. Constitution and properties of matter Including molecular physics, relativity, quantum theory, and solid state physics
Depositing User: Enrico Scalas
Date Deposited: 02 Oct 2014 13:13
Last Modified: 02 Oct 2014 13:13
URI: http://sro.sussex.ac.uk/id/eprint/50315
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