Effects of surface topography on the collective diffusion of interacting adsorbed particles

RODRIGUEZ M. E.; PASINETTI M.; F. BULNES; A. J. RAMIREZ-PASTOR

PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2014 p. 156 - 166

0378-4371

Energetic topography effects on the collective motion of interacting adsorbed particles. Collective diffusion of particles with repulsive nearest-neighbor interactions on bivariate surfaces is studied through Monte Carlo simulation, in the framework of the Kubo?Green theory. Weak and strong adsorbing sites form l x l patches distributed at random or in chessboard-like ordered domains on a two-dimensional square lattice. The influence of the energetic correlation and the lateral interactions on the jump and collective diffusion coefficients is analyzed by simulating the coverage fluctuations in the grand canonical ensemble and the mean-square displacements of particles in the canonical ensemble. The combination topography-lateral couplings is shown to strongly affect the coverage dependence of the transport coefficients.