The barrier model with random distribution of barrier energies was considered at non-zero particle concentrations. The statistical mechanics expressions for the jump diffusion coefficient that takes into account interparticle interactions were derived for dynamic and static disorder. For the former case the analytical expression for the barrier energy contribution was calculated, while for the latter case the limiting low and high temperature contributions were obtained. The derived expressions were tested by Monte Carlo simulations.

Diffusion Characteristics of Particles on Energetically Disordered Lattices. P.Argyrakis, E.Arapaki, S.V.Dubinin, Y.G.Groda, V.S.Vikhrenko: Solid State Ionics, 2008, 179[1-6], 143-7