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Super-Arrhenius slowing down in the metastable liquid of hard spheres

M. Dzugutov
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Abstract

It is demonstrated that a straightforward extension of the Arrhenius law accurately describes diffusion in the thermodynamically stable liquid of hard spheres. A sharp negative deviation from this behaviour is observed as the liquid is compressed beyond its stability limit, which can be compared with super-Arrhenius slowing down in supercooled liquids. It is suggested that the observed dynamical transition is caused by extra entropy barriers arising in the free-energy landscape. This interpretation is corroborated by the observation of characteristic anomalies in the geometry of a particle trajectory.

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BibTeXRIS

M. Dzugutov. 2001-03-05. Super-Arrhenius slowing down in the metastable liquid of hard spheres. https://doi.org/10.1103/physreve.65.032501

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