Diffusion in mixedA-Balloys in two and three dimensions

Abstract
Precision Monte Carlo simulations of labeled particle diffusion in mixed A-B alloys in two and three dimensions are reported. A variety of concentrations and ratios of the hopping rates JB/JA=η are analyzed. Results are compared with those predicted by available theories. The validity of these theories is observed to be strictly limited to the region where η>1/z (z is the lattice coordination number).