We present comprehensive numerical results for phase ordering dynamics in the clock model with a conserved order parameter. Our study is based on a dynamical model for a coarse-grained complex order parameter. We find that there is a dynamical crossover from vortex-driven growth at early times to interface-driven growth at later times. The crossover time is later for higher values of the ground-state degeneracy of the clock model.

• Received 30 October 1996

DOI:https://doi.org/10.1103/PhysRevE.55.2345