Fractional Stokes-Einstein and Debye-Stokes-Einstein relations in a network forming liquid

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.

References in corpus (1)

• Excitation lines and the breakdown of Stokes-Einstein relations in supercooled liquids

Cited by in corpus (4)

• Structural and dynamical heterogeneity in a glass forming liquid
• Computational probes of molecular motion in the Lewis and Whanstrom model for ortho-terphenyl
• Viscoelasticity and Stokes-Einstein relation in repulsive and attractive colloidal glasses
• Spectral statistics of the quenched normal modes of a network-forming molecular liquid