Abstract
We incorporate the role of free volume in the density function ofamorphous structure and study its effects on the stability ofsuch structures. Density functional theory is used to explorethis `free-volume model' of supercooled structures. Free-energy minimization is carried out using the void concentration as avariational parameter. A critical value of this concentrationexists corresponding to the free-energy minima of the amorphousstructure. An increase in the stability is observed due to theinclusion of voids in the density structure. This study isconducted for both weakly and highly localized amorphousstructures. The free-volume concentration shows a power-lawdecrease with density for the weakly localized states and a lineardecrease for the highly localized amorphous structures.
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