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- W2072134443 abstract "The dynamics of atoms in registered monolayers at surfaces is treated in the framework of a kinetic lattice gas model, where atoms may randomly jump to neighboring empty sites of the chosen lattice. Particular attention is payed to the influence of order-disorder transitions in the adsorbed layer on both the self-diffusion coefficient and the chemical diffusion constant. As an explicit example, the square lattice with repulsion between nearest and next-nearest neighbors is studied by Monte Carlo methods. It is shown that in the regime of temperature and coverage where a 2×1 structure occurs, the diffusion constants become strongly anisotropic: much less diffusion occurs perpendicular to the close-packed one-dimensional rows than in the direction parallel to them, and at low temperatures quasi-one-dimensional behavior occurs. The chemical diffusivity is also studied with mean-field approximations. The generalization to other choices of interactions and other lattices is discussed briefly, as well as possible experimental applications." @default.
- W2072134443 created "2016-06-24" @default.
- W2072134443 creator A5037753080 @default.
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- W2072134443 date "1983-01-01" @default.
- W2072134443 modified "2023-09-23" @default.
- W2072134443 title "Diffusion of absorbed atoms in ordered and disordered monolayers at surfaces" @default.
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- W2072134443 doi "https://doi.org/10.1016/s0039-6028(83)80038-7" @default.
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