Abstract
The influence of interactions between adsorbed particles on their diffusion constant is investigated by kinetic Ising models with independent nearest neighbour hops. This leads to expressions for the ratio of the diffusion constant at arbitrary coverage θ to its value at θ = 0 as a function of the interaction energies relative to temperature. It is shown that under certain conditions this quantity obeys a particle-hole symmetry. Exact results in the whole range of densities are given in one dimension for nearest neighbour interaction. They already yield a qualitative agreement with experimental results and are also compared to corresponding numerical simulations. The introduction of a next nearest neighbour interaction is shown to produce drastic changes in the density dependence of the diffusion constant in some of the cases. A generalized quasichemical approximation and a virial expansion are made in two dimensions, leading to a better agreement with the measurements.
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© 1983 Plenum Press, New York
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Zweger, W. et al. (1983). Surface Diffusion: Recent Works (Abstracts). In: Binh, V.T. (eds) Surface Mobilities on Solid Materials. NATO Advanced Science Institutes Series, vol 86. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-4343-1_22
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DOI: https://doi.org/10.1007/978-1-4684-4343-1_22
Publisher Name: Springer, Boston, MA
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