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Abstract: Collective diffusion coefficient in a one dimensional lattice gas adsorbateis calculated using variational approach. Particles interact via either along-range, or a long range electron-gas-mediated for a metallic substrate,or a Lennard-Jones interaction. Diffusion coefficient as a function of theadsorbate density strongly depends on the relationship between the substratelattice constant and the characteristic length of the inter-particleinteraction potential which determines positions of the potential energyminima. The diffusion coefficient at fixed density as a function of theinteraction characteristic length has an oscillating character due to theinterplay between the inter-particle distances allowed by the substratelattice structure and the average inter-particle distances which minimize thetotal interaction energy.



Author: Filip Krzyżewski, Magdalena A. Załuska-Kotur

Source: https://arxiv.org/



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