CRITICAL-BEHAVIOR OF SURFACE-REACTION MODELS

We introduce a monomer-dimer catalysis model with variable excluded volume interactions between the same species. With infinitely strong interactions, this model exhibits a continuous transition from a reactive phase into an absorbing phase of monomers in one dimension. This absorbing state is identified as a doubly-degenerate state of monomers adsorbed in the alternating sites and vacancies in the other sites. We show numerically that the continuous transition from the reactive phase into this absorbing phase belongs to a new universality class other than the conventional one of the Reggeon field theory.