Water-like hierarchy of anomalies in a continuous spherical shouldered potential

Details Water-like hierarchy of anomalies in a continuous spherical shouldered potential Water-like hierarchy of anomalies in a continuous spherical shouldered potential

2007-06-19

arxiv.org/abs/0706.2838v3

Journal of Chemical Physics 128, 064901 (2008)

Physics

Condensed Matter

Statistical Mechanics

27 pages, 9 figures. to appear in J. Chem. Phys

Scientific paper

10.1063/1.2830706

We investigate by molecular dynamics simulations a continuous isotropic core-softened potential with attractive well in three dimensions, introduced by Franzese [cond-mat/0703681, to appear on Journal of Molecular Liquids], that displays liquid-liquid coexistence with a critical point and water-like density anomaly. Here we find diffusion and structural anomalies. These anomalies occur with the same hierarchy that characterizes water. Yet our analysis shows differences with respect to the water case. Therefore, many of the anomalous features of water could be present in isotropic systems with soft-core attractive potentials, such as colloids or liquid metals, consistent with recent experiments showing polyamorphism in metallic glasses.

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