Model of surface instabilities induced by stress

Details Model of surface instabilities induced by stress Model of surface instabilities induced by stress

1998-06-23

arxiv.org/abs/cond-mat/9806278v1

Physics

Condensed Matter

Materials Science

4 pages (3 figures included)

Scientific paper

10.1103/PhysRevLett.82.1736

We propose a model based on a Ginzburg-Landau approach to study a strain relief mechanism at a free interface of a non-hydrostatically stressed solid, commonly observed in thin-film growth. The evolving instability, known as the Grinfeld instability, is studied numerically in two and three dimensions. Inherent in the description is the proper treatment of nonlinearities. We find these nonlinearities can lead to competitive coarsening of interfacial structures, corresponding to different wavenumbers, as strain is relieved. We suggest ways to experimentally measure this coarsening.

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