Computational investigations of mechanical and vibrational properties of quaternary semiconductor alloys MgxZn1-xSySe1-y

Abstract

Physical properties like elastic constants, pressure derivative of bulk modulus, pressure derivative of elastic constants and acoustic wave velocities in different directions for Mg x Zn 1-x S , Mg x Zn 1-x Se and ZnS y Se 1-y semiconductor ternary alloys and Mg x Zn 1-x S y Se 1-y quaternary alloys with different concentrations of x and y are studied using our previously proposed potential based on the pseudopotential formalism. It is noticed from the present study that the physical properties under investigations depend on concentrations x and y of constitute compounds. The present results of various physical quantities of compounds presented here are compared with the available experimental data and other theoretical estimations and showed roughly reasonable agreement. The numerical values of same quantities for ternary alloys and MgZnSSe quaternary alloys were reported first time and hence such results may be useful for comparison purpose in future with either the experimental or the theoretical work.