Effect of particle-hole symmetry on the behavior of tracer and jump diffusion coefficients

J. J. TORREZ HERRERA, G. A: RANZUGLIA, S. J. MANZI, V. D. PEREYRA

PHYSICAL REVIEW E

AMER PHYSICAL SOC

Lugar: New York; Año: 2013 vol. 87 p. 521011 - 5210111

1539-3755

This paper analyzes the effect of particle-hole symmetry on the behavior of the tracer diffusion coefficient as well as the jump diffusion coefficient. The coefficients are obtained by performing a random walk of individual atoms in a two-dimensional square lattice at monolayer, using the n-fold way Monte Carlo simulation. Different hopping mechanisms have been introduced to study the effect of particle-hole symmetry. For hopping kinetics where the initial-state interactions are involved, the diffusion coefficient at high coverage falls several orders of magnitude due to the effect of particle-hole symmetry. For hopping kinetics where the final-state interactions are present, the effect is the opposite. For those involving both initial- and final-state interactions, like the so-called interaction kinetics, the effect of particle-hole symmetry is also discussed. This effect seems to be critical for repulsive lateral interactions, for which the behavior of the diffusion coefficients is modified by introducing the particle-hole symmetry condition.