Stability of Amorphous Structures with Voids

Details Stability of Amorphous Structures with Voids Stability of Amorphous Structures with Voids

2001-03-21

arxiv.org/abs/cond-mat/0103432v1

Physics

Condensed Matter

Statistical Mechanics

13 pages, 6 figures

Scientific paper

10.1088/0953-8984/13/33/307

We incorporate the role of free volume in the density function of the amorphous structure and study its effects on the stability of such structures. The Density Functional Theory is used to explore this ``Free Volume Model'' of the supercooled structures. The Free energy minimization is carried out using the void concentration as a variational parameter. A critical value of this concentration exists corresponding to the Free energy minima of the amorphous structure. An increase in the stability is observed due to the inclusion of voids in the density structure. This study is conducted for both the weakly and highly localized amorphous structures. The free volume concentration shows a power law decrease with density for the weakly localized states and a linear decrease for the highly localized amorphous structures.

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