Theoretical evaluation of physicochemical parameters of (Ge20Te80)x(Se80Te20)100-x pseudobinary chalcogenide glassy alloy

Abstract

Chalcogen (S, Se, Te) rich pseudobinary glassy systems have potential applications in nonlinear optical limiting and switching devices. A pseudobinary glassy system (Ge20Te80)x(Se80Te20)100-x has been investigated for different important physical parameters viz. molar volume (Vm), average heat of atomization (Hs), lone pair electrons (L), number of constraints (Ncon), average coordination number (<r>), cohesive energy (CE), mean bond energy (<E>), and glass transition temperature (TgL), etc. with the variation in (Ge20Te80) content. Linear variation in glass transition temperature with varying heat of atomization and variation of high refractive index as a result of increasing density may account for the optical limiting effect. The approximated critically calculated physical parameters in the present study reveal the structural detail of investigated glass for optical limiting applications.