Crossover between mean-field and Ising critical behavior in a lattice-gas reaction-diffusion model

Liu, Da-Jiang; Pavlenko, N.; Evans, J. W.

Crossover between mean-field and Ising critical behavior in a lattice-gas reaction-diffusion model

Authors

Liu, Da-Jiang

Pavlenko, N.

Evans, J. W.

Description

Lattice-gas models for CO oxidation can exhibit a discontinuous nonequilibrium transition between reactive and inactive states, which disappears above a critical CO-desorption rate. Using finite-size-scaling analysis, we demonstrate a crossover from Ising to mean-field behavior at the critical point, with increasing surface mobility of adsorbed CO or with decreasing system size. This behavior is elucidated by analogy with that of equilibrium Ising-type systems with long-range interactions.
6 pages, 3 figures