Configuration space connectivity across the fragile to strong transition in silica
Soft Condensed Matter
2009-11-07 v1 Disordered Systems and Neural Networks
Abstract
We present a numerical analysis for SiO_2 of the fraction of diffusive direction f_diff for temperatures T on both sides of the fragile-to-strong crossover. The T-dependence of f_diff clearly reveals this change in dynamical behavior. We find that for T above the crossover (fragile region) the system is always close to ridges of the potential energy surface (PES), while below the crossover (strong region), the system mostly explores the PES local minima. Despite this difference, the power law dependence of f_diff on the diffusion constant, as well as the power law dependence of f_diff on the configurational entropy, shows no change at the fragile to strong crossover.
Keywords
Cite
@article{arxiv.cond-mat/0108546,
title = {Configuration space connectivity across the fragile to strong transition in silica},
author = {Emilia La Nave and H. Eugene Stanley and Francesco Sciortino},
journal= {arXiv preprint arXiv:cond-mat/0108546},
year = {2009}
}