Estimation of the instable composition areas and its dependence on the thickness of GalnAsSb layers grown on different substrates

In this work we inform about the results of estimations of the changes of the spinodal decomposition areas and its dependence on the thickness of epitaxial layers. The calculations have been performed using the CALPHAD method and the SGTE data taking into account the elastic energy generated by the...

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Bibliographic Details
Published in:Journal of physics. Conference series 2017-01, Vol.792 (1), p.12011
Main Authors: Castillo, E G, Castillo, A K, Michournyi, V A, De Anda, F, Yu Gorbatchev, A
Format: Article
Language:English
Subjects:
Composition
Epitaxial layers
Lattice matching
Miscibility
Physics
Solid solutions
Spinodal decomposition
Substrates
Thickness
Thin films
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Summary:In this work we inform about the results of estimations of the changes of the spinodal decomposition areas and its dependence on the thickness of epitaxial layers. The calculations have been performed using the CALPHAD method and the SGTE data taking into account the elastic energy generated by the lattice mismatch between forming solid solutions and substrate. We have shown that in thin layers the elastic energy may serve both as a stabilizing factor for compositions inside the immiscibility region but lattice matched, or close, to the substrate and, on the contrary, as a reason of instability for the compositions laying in the periphery of the miscible regions.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/792/1/012011