Kinetic roughening and phase ordering in the two-component growth model

TL;DR

This study investigates how kinetic roughening and phase ordering interact in a two-component growth model, revealing that strong interactions significantly influence surface roughness, scaling behavior, and the formation of lamellar structures.

Contribution

It introduces a Monte Carlo simulation of a two-component growth SOS model with Ising-like interactions, highlighting the effects of coupling on surface morphology and phase ordering.

Findings

Surface roughness increases with coupling strength.

Scaling exponents are enhanced compared to homogeneous growth.

Lamellar structures persist for long times in strong coupling regimes.

Abstract

Interplay between kinetic roughening and phase ordering is studied in a growth SOS model with two kinds of particles and Ising-like interaction by Monte Carlo simulations. We found that, for a sufficiently large coupling, growth is strongly affected by interaction between species. Surface roughness increases rapidly with coupling. Scaling exponents for kinetic roughening are enhanced with respect to homogeneous situation. Phase ordering which leads to the lamellar structure persisting for a long time is observed. Surface profiles in strong coupling regime have a saw-tooth form, with the correlation between the positions of local minima and the domain boundaries.