INTERPLAY BETWEEN KINETIC ROUGHENING AND PHASE ORDERING

We studied the interplay between kinetic roughening and phase ordering in a (1 + 1)-dimensional single-step solid-on-solid growth model with two kinds of particles and Ising-like interaction. Evolution of both geometrical and compositional properties was investigated by Monte Car lo simulations for various strengths of coupling. The found that the i nitial growth is strongly affected by the interaction between species, scaling exponents are enhanced and ordering on the surface is observe d. However, after a certain time, ordering along the surface stops and the scaling exponents cross over to exponents of the Kardar-Parisi-Zh ang universality class. For sufficiently strong coupling, ordering in the vertical direction is present and leads to a columnar structure pe rsisting for a long time.