Universal domain growth in a lattice-gas model of O/Pd(110)

We have studied the time evolution of domains in the uniaxial (3×{}1) phase of a model of O/Pd(110). We have employed the Monte Carlo method to study both evaporation-condensation and diffusion dynamics in this system. We find the growth to proceed strongly anisotropically with a change in this spatial anisotropy near wetting transitions which occur in the model. However, we obtain a universal growth exponent n=0.5 which holds everywhere in the phase diagram of this model at moderately low temperatures. We also find that the generalized anisotropic scaling holds to a good degree of accuracy. Finally, we present theoretical arguments to explain the observed universal features of growth in the uniaxial (3×{}1) phase.