TITLE

Electromigration-driven surface morphological stabilization of a coherently strained epitaxial thin film on a substrate

AUTHOR(S)
Sfyris, Georgios I.; Gungor, M. Rauf; Maroudas, Dimitrios
PUB. DATE
June 2010
SOURCE
Applied Physics Letters;6/7/2010, Vol. 96 Issue 23, p231911
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We analyze the surface morphological stability of a coherently strained thin film grown epitaxially on a thick elastic substrate under the simultaneous action of an electric field that drives surface electromigration. A model of driven film surface morphological evolution is developed and a linear stability analysis is carried out of the planar film surface morphology. The analysis reveals that surface electromigration can inhibit surface morphological instabilities due to the lattice mismatch between the film and the substrate. The critical electric-field strength for surface stabilization and the optimal electric-field direction are determined and the effects of surface diffusional anisotropy are examined.
ACCESSION #
51378935

 

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