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Main Title: Anisotropic surface energy formulations and their effect on stability of a growing thin film
Author(s): Korzec, Maciek D.
Münch, Andreas
Wagner, Barbara
Type: Article
Language Code: en
Abstract: In this paper we revisit models for the description of the evolution of crystalline films with anisotropic surface energies.We prove equivalences of symmetry properties of anisotropic surface energy models commonly used in the literature. Then we systematically develop a framework for the derivation of surface diffusion models for the self-assembly of quantum dots during Stranski-Krastanov growth that include surface energies also with large anisotropy as well as the effect of wetting energy, elastic energy and a randomly perturbed atomic deposition flux. A linear stability analysis for the resulting sixth-order semilinear evolution equation for the thin film surface shows that that the new model allows for large anisotropy and gives rise to the formation of anisotropic quantum dots. The nonlinear three-dimensional evolution is investigated via numerical solutions. These suggest that increasing anisotropy stabilizes the faceted surfaces and may lead to a dramatic slow-down of the coarsening of the dots.
Issue Date: 2012
Date Available: 10-Jan-2019
DDC Class: 510 Mathematik
Subject(s): anisotropic surface energy
high order partial differential equations
pseudospectral methods
surface diffusion
Journal Title: Interfaces and free boundaries
Publisher: European Mathematical Society
Publisher Place: Zürich
Volume: 14
Issue: 4
Publisher DOI: 10.4171/IFB/291
Page Start: 545
Page End: 567
EISSN: 1463-9971
ISSN: 1463-9963
Notes: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
Appears in Collections:Inst. Mathematik » Publications

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