The influence of surface reconstruction upon the diffusion of particles adsorbed on the surface was investigated within the framework of a symmetrical 4-position model. The analytical expressions for free energy and diffusion coefficients were obtained by assuming that lateral interaction between the particles was negligibly small. The critical behavior of the system was described by the Ising spin model. The coverage dependencies of the tracer, jump and chemical diffusion coefficients were calculated for some representative temperatures. The dependences showed clearly the strong influence of surface reconstruction upon the thermodynamic and kinetic phenomena: diffusion coefficients became anisotropic on the reconstructed surface. To check the analytical results, Monte Carlo simulations of diffusion on this lattice were used.

Diffusion of Particles on a Heterogeneous Surface - a Case of Adsorption-Induced Surface Reconstruction. N.Tarasenko, A.Tarasenko, L.Jastrabik: Applied Surface Science, 2005, 252[3], 668-77