Fractional Stokes-Einstein and Debye-Stokes-Einstein relations in a network forming liquid
Soft Condensed Matter
2009-11-11 v1
Abstract
We study the breakdown of the Stokes-Einstein (SE) and Debye-Stokes-Einstein (DSE) relations for translational and rotational motion in a prototypical model of a network-forming liquid, the ST2 model of water. We find that the emergence of ``fractional'' SE and DSE relations at low temperature is ubiquitous in this system, with exponents that vary little over a range of distinct physical regimes. We also show that the same fractional SE relation is obeyed by both mobile and immobile dynamical heterogeneities of the liquid.
Cite
@article{arxiv.cond-mat/0605170,
title = {Fractional Stokes-Einstein and Debye-Stokes-Einstein relations in a network forming liquid},
author = {Stephen R. Becker and Peter H. Poole and Francis W. Starr},
journal= {arXiv preprint arXiv:cond-mat/0605170},
year = {2009}
}