Lateral alloy segregation in thin heteroepitaxial films

J. M. Reich; X. B. Niu; Y. J. Lee; R. E. Caflisch; C. Ratsch

doi:10.1103/PhysRevB.79.073405

Lateral alloy segregation in thin heteroepitaxial films

J. M. Reich, X. B. Niu, Y. J. Lee, R. E. Caflisch, C. Ratsch

Mathematics

Research output: Contribution to journal › Article › peer-review

Abstract

Alloy segregation is believed to be an important factor in the growth of the wetting layer and subsequent formation of islands during heteroepitaxy. We report simulated annealing results that determine the lowest-energy configuration of a strained system. Our results indicate that in addition to vertical segregation, there is also an energetic driving force for lateral segregation and formation of subsurface features before island formation. We believe that these subsurface features play a crucial role in the nucleation of islands.

Original language	English (US)
Article number	073405
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	79
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.79.073405
State	Published - Feb 13 2009

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.79.073405

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AU - Niu, X. B.

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AU - Caflisch, R. E.

AU - Ratsch, C.

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Lateral alloy segregation in thin heteroepitaxial films

Abstract

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