Solvent diffusion kinetics in the dilute random alloy

In this paper we address the problem of enhancement of the solvent diffusivity by the addition of very small amounts of solute. The random alloy model is employed at the dilute limit. No Monte Carlo calculations have been available for evaluating the available theoretical treatments. In the present study we report on very-high-precision results of the solvent correlation factors as obtained from Monte Carlo calculations with averaging over 6 210 7 atoms and very long runs (2000 jumps per atom). The results are expressed in terms of the usual solvent enhancement factors b 1 and b 2 . There is good agreement with the theory of Holdsworth and Elliott and excellent agreement with the theory of Moleko et al . but not with other available theories.