Journal of Physical Studies 8(1), 77–83 (2004) DOI: https://doi.org/10.30970/jps.08.77 OPTICAL PROPERTIES OF DISORDEED DIAMOND-LIKE SOLID SUBSTITUTIONAL SOLUTIONS Ge1-xSix, Ge1-xSnx, Si1-xSnx, Si1-xCx AND THEIR THIN FILMS Yu. G. Korolyuk, V. G. Deibuk, Ya. I. Vyklyuk Chernivtsi State University, 2 Kotsyubinskiy St., Chernivtsi, UA-58012, Ukraine

The electronic structure of bulk and biaxially deformed Ge$_{1 - x}$Si$_{x}$, Ge$_{1 - x}$Sn$_{x}$, Si$_{1 - x}$Sn$_{x}$, Si$_{1 - x}$C$_{x }$ solid substitutional solutions is calculated using the local model pseudopotential method as well as compositional and positional disorder. The influence of different types of disorder and deformations on the behaviour of dielectric function is explained having been studied experimentally.

PACS number(s): 68.65.+g

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