Phonon frequencies, mechanical and optoelectronic properties for InP_xAs_ySb_(1-x-y)/InAs alloys under the influence of pressure

摘要

The pressure dependence of electronic and optical properties for InP_xAs_ySb_(1-x-y) alloys lattice matched to In As substrate has been investigated. The mechanical properties and the phonon frequencies for InP_xAs_ySb_(1-x-y)/InAs system under the effect of pressure have been studied. The physical properties of the binary components InP, InAs and InSb that constitute the quaternary alloy were used in this analysis. The study achieved using the empirical pseudo-potential approach (EPM) under the virtual crystal approximation (VCA). Our findings were found to be in good agreement with experimental and theoretical data at p = 0 kbar. Our results may serve as reference for the future experimental values at high pressures. The pressure dependence of the fundamental properties of InP_xAs_ySb_(1-x-y)/InAs system such as optical constants and modes of lattice vibration has not been fully studied. So, we have concentrated on these properties under the effect of pressure.