title: Formation of strained ring-shaped islands around square notches.
abstract: The location and morphology of a two-dimensional island has been studied theoretically as a function of the misfit stress in the neighbourhood of a square notch present on the free surface of an epitaxially stressed film deposited on a substrate. From a static energy calculation, it has been shown that the notches can drive the motion of the islands towards the notches. It was then found that, depending on the side length and depth of the notch, self-organized formation at constant volume of a two-dimensional ring-shaped island can be favoured along the periphery of the pre-existing notch with respect to the notch shrinking.
authors.affiliation: Département Physique et Mécanique des Matériaux, Institut P', CNRS-Université de Poitiers-ENSMA, SP2MI-Téléport 2, Futuroscope-Chasseneuil, France. jerome.colin@univ-poitiers.fr
authors.forename: Jérôme
authors.initials: J
authors.lastname: Colin