Non-equilibrium surface diffusion in the O/W(110) system

Details Non-equilibrium surface diffusion in the O/W(110) system Non-equilibrium surface diffusion in the O/W(110) system

1996-06-25

arxiv.org/abs/cond-mat/9606184v1

Physics

Condensed Matter

14 pages LaTeX and five PostScript figures; tarred, gzip'ed, and uuencoded. Uses elsart.sty and elsart12.sty which are include

Scientific paper

10.1016/0039-6028(96)00931-4

In this Letter, we present results of an extensive Monte Carlo study of the O/W(110) system under non-equilibrium conditions. We study the mean square displacements and long wavelength density fluctuations of adatoms. From these quantities, we define effective and time-dependent values for the collective and tracer diffusion mobilities. These mobilities reduce to the usual diffusion constants when equilibrium is reached. We discuss our results in view of existing experimental measurements of effective diffusion barriers, and the difficulties associated with interpreting non-equilibrium data.

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