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Physical Review B 76 (2007) 165319
Nonlinear evolution of a morphological instability in a strained epitaxial film
Jean-Noël Aqua 1, Thomas Frisch 1, Alberto Verga 1
(2007)

A strained epitaxial film deposited on a deformable substrate undergoes a morphological instability relaxing the elastic energy by surface diffusion. The nonlinear dynamical equation of such films with wetting interactions are derived and solved numerically in two and three dimensions. Nonlocal nonlinearities together with wetting effects are crucial to regularize the instability leading to an island morphology. The island chemical potential decreases with its volume and the system consistently experiences a non-interrupted coarsening evolution described by power laws with a marked dimension dependence.
1 :  Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE)
CNRS : UMR6594 – Université de Provence - Aix-Marseille I – Université de la Méditerranée - Aix-Marseille II – Ecole Centrale de Marseille
Physique/Matière Condensée/Mécanique statistique

Physique/Matière Condensée/Science des matériaux
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