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Título

Bulk mediated surface diffusion: the infinite system case

AutorRevelli, Jorge A.; Budde, Carlos E.; Prato, D.; Wio, Horacio S.
Palabras claveRandom walk
Surface diffusion
Mean first passage time
[PACS] Random walks and Levy flights
[PACS] Stochastic processes
[PACS] Random phenomena and media
Fecha de publicaciónnov-2003
EditorEDP Sciences
Società Italiana di Fisica
Springer
CitaciónThe European Physical Journal B - Condensed Matter and Complex Systems 36(2): 245-251 (2003)
ResumenAn analytical soluble model based on a "Continuous Time Random Walk" (CTRW) scheme for the adsorption-desorption processes at interfaces, called bulk-mediated surface diffusion, is presented. The time evolution of the effective probability distribution width on the surface is calculated and analyzed within an anomalous diffusion framework. The asymptotic behavior for large times shows a sub-diffusive regime for the effective surface diffusion but, depending on the observed range of time, other regimes may be obtained. Monte Carlo simulations show excellent agreement with analytical results. As an important byproduct of the indicated approach, we present the evaluation of the time for the first visit to the surface.
Descripción7 pages, 5 figures.-- PACS nrs.: 05.40.Fb; 02.50.Ey; 46.65.+g.-- ArXiv pre-print available at: http://arxiv.org/abs/cond-mat/0309054
Versión del editorhttp://dx.doi.org/10.1140/epjb/e2003-00341-x
URIhttp://hdl.handle.net/10261/14878
DOI10.1140/epjb/e2003-00341-x
ISSN1434-6028 (Print)
1434-6036 (Online)
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