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Bulk-mediated surface diffusion: Return probability in an infinite system

Journal of Physics Condensed Matter, ISSN: 0953-8984, Vol: 19, Issue: 6
2007
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Article Description

We analyse the dynamics of adsorbed molecules within the bulk-mediated surface diffusion framework. We consider that the particle's desorption mechanism is characterized by a non-Markovian process, while the particle's motion in the bulk is governed by Markovian dynamics, and also include the effect of a Markovian absorption probability on the surface. We study this system for the diffusion of particles in a semi-infinite lattice, analysing the return probability to the reference absorptive plane as well as the mean return time to such a surface. Comparisons with numerical simulations show an excellent agreement. © IOP Publishing Ltd.

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