Anisotropic spatially heterogeneous dynamics in a model glass-forming binary mixture
Statistical Mechanics
2015-06-25 v1
Abstract
We calculated a four-point correlation function G_4(k,r;t) and the corresponding structure factor S_4(k,q;t) for a model glass-forming binary mixture. These functions measure the spatial correlations of the relaxation of different particles. We found that these four-point functions are anisotropic and depend on the angle between vectors k and r (or q). The anisotropy is the strongest for times somewhat longer than the beta relaxation time but it is quite pronounced even for times comparable to the alpha relaxation time, tau_alpha. At the lowest temperatures S_4(k,q;tau_alpha) is strongly anisotropic even for the smallest wavevector q accessible in our simulation.
Cite
@article{arxiv.cond-mat/0608398,
title = {Anisotropic spatially heterogeneous dynamics in a model glass-forming binary mixture},
author = {Elijah Flenner and Grzegorz Szamel},
journal= {arXiv preprint arXiv:cond-mat/0608398},
year = {2015}
}