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Séminaire de l’équipe Mécanique multi-échelles des solides faibles" de l’INSP

Interface kinetics in phase field models : Isothermal growth of binary alloys and step dynamics in Molecular Beam Epitaxy - Efim Brener - Lundi 22 avril 2013 à 11 h

Efim Brener, Peter Grünberg Institut, Forschungszentrum Juelich, Professeur invité à l’UMPC
Lundi 22 avril 2013 à 11 h - Couloir 22-32, 2e étage, salle 201

We present a phase field model for isothermal transformations of two component alloys and step dynamics in Molecular Beam Epitaxy. The model includes Onsager kinetic cross coupling between the non-conserved phase field φ and the conserved concentration field C. We also provide the reduction of the phase field model to the corresponding macroscopic description of the free boundary problem. The relevance of the newly introduced terms to Ehrlich-Schwoebel effect and to the step-bunching instability in MBE is discussed and numerically confirmed.