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

8th International Congress of Engineering Physics

物理学;工业技术

Castillo, E.G.^1 ; Castillo, A.K.^1 ; Michournyi, V.A.^1 ; De Anda, F.^1 ; Yu Gorbatchev, A.^1

Universidad Autónoma de San Luis Potosó, Institute de Investigatión en Comunicación Óptica, Av. Karacorum 1470, Col. Lomas, San Luis Potosó

CP 78210, Mexico^1

关键词: CALPHAD method;    Different substrates;    Elastic energy;    Lattice-matched;    Stabilizing factors;    Thin layers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/792/1/012011/pdf
DOI  :  10.1088/1742-6596/792/1/012011

学科分类：工业工程学

来源: IOP

【 摘 要 】

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.