Michigan Technological University
Department of Physics

is pleased to announce a colloquium

with

Da Gao

Monte Carlo simulations of surface phase transitions and morphology dynamics

In this talk two problems will be discussed and addressed via Monte-Carlo simulations. One is the relationship between crystal structure and the corresponding surface phases and phase transitions. A modulated layered crystal model (LCM) is proposed and the metropolis Monte-Carlo simulation results suggest that modulations of the sequence and the energies of the bond-cost layers may introduce several intermediate phases and finally lead to roughening. The other problem is to study the effects of impurities on the surface morphology during the crystal growth. A solid-on-solid (SOS) model combined with the Kinetic Monte-Carlo (KMC) method is implemented. The preliminary KMC simulation results are in good agreement with the theoretical predictions. We propose next to study the interactions between the impurities and the kinks and steps.

Friday, May 9, 2003

10:00 a.m., Fisher 101

This talk is part of the "Preliminary" Ph.D. Examination requirement

MTU | Physics | Colloquium