The trouble with crystal facets
Dionisios Margetis, University of Maryland, College Park

 At low enough temperatures, the surfaces of crystals often have macroscopic flat parts called facets. In many experimental situations, crystal surface structures are not in equilibrium.
Consequently, these structures along with their facets evolve. A challenging issue is to describe facet evolution by use of continuum models (PDEs) consistently with the underlying motion of crystal defects, especially atomic steps. In this talk, I will present progress and open questions in this direction.