MORPHOLOGIES IN ANISOTROPIC CLUSTER GROWTH - A MONTE-CARLO STUDY ON AG(110)

A model with deposition, diffusion, and reversible aggregation on a tw o-dimensional rectangular lattice with both anisotropic diffusion barr iers and anisotropic nearest-neighbor bonds is studied by kinetic Mont e Carlo simulations. The model is applied to the case of Ag growth on Ag(110). The barriers for the elementary processes are calculated by m any-body tight-binding potentials. At fixed T decreasing the Bur (or a t fixed Bur and increasing T), the model displays morphology changes f rom small isotropic aggregates to one-dimensional strips and then to t wo-dimensional islands.