Structural Relaxation and Mode Coupling in a Simple Liquid: Depolarized Light Scattering in Benzene

Details Structural Relaxation and Mode Coupling in a Simple Liquid: Depolarized Light Scattering in Benzene Structural Relaxation and Mode Coupling in a Simple Liquid: Depolarized Light Scattering in Benzene

2002-04-08

arxiv.org/abs/cond-mat/0204184v2

New J. Phys. 4, 56 (2002)

Physics

Condensed Matter

Soft Condensed Matter

submitted to New J. Phys

Scientific paper

10.1088/1367-2630/4/1/356

We have measured depolarized light scattering in liquid benzene over the whole accessible temperature range and over four decades in frequency. Between 40 and 180 GHz we find a susceptibility peak due to structural relaxation. This peak shows stretching and time-temperature scaling as known from $\alpha$ relaxation in glass-forming materials. A simple mode-coupling model provides consistent fits of the entire data set. We conclude that structural relaxation in simple liquids and $\alpha$ relaxation in glass-forming materials are physically the same. A deeper understanding of simple liquids is reached by applying concepts that were originally developed in the context of glass-transition research.

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