Comment on "First order amorphous-amorphous transformation in silica"
Materials Science
2009-11-07 v1
Abstract
In a recent letter (Phys. Rev. Lett. 84, 4629 (2000)), Lacks presents evidence of a first order amorphous-amorphous transition in silica at T=0. He calculates the free energy along a path of compression and successive decompression of a sample of 108 SiO2 units. The free energy of the two branches cross each other, and this is interpreted as evidence of a first order transition. We show that this conclusion does not follow from the shown data, since qualitatively the same phenomenology is obtained in a model where a first order transition does not exist.
Keywords
Cite
@article{arxiv.cond-mat/0102314,
title = {Comment on "First order amorphous-amorphous transformation in silica"},
author = {E. A. Jagla},
journal= {arXiv preprint arXiv:cond-mat/0102314},
year = {2009}
}
Comments
1 page, 1 figure, to appear in Phys. Rev. Lett