Use of few-domain classical models to study mode locking in charge-density-wave systems

We have investigated the mode-locking observed in charge-density-wave systems in the context of classical models with a small number of overdamped domains. It is shown that such models exhibit subharmonic as well as harmonic phase lock, with qualitative dependence on ac drive similar to that found experimentally. We further find that phase locking becomes more difficult as the number of domains increases, indicating the possibility of quantitative agreement with a more complex model.