A discrete model of water with two distinct glassy phases

Details A discrete model of water with two distinct glassy phases A discrete model of water with two distinct glassy phases

2010-06-09

arxiv.org/abs/1006.1750v2

Europhys. Lett. 92, 46008 (2010)

Physics

Condensed Matter

Soft Condensed Matter

expanded version: 6 pages, 7 figures

Scientific paper

We investigate a minimal model for non-crystalline water, defined on a Husimi lattice. The peculiar random-regular nature of the lattice is meant to account for the formation of a random 4-coordinated hydrogen-bond network. The model turns out to be consistent with most thermodynamic anomalies observed in liquid and supercooled-liquid water. Furthermore, the model exhibits two glassy phases with different densities, which can coexist at a first-order transition. The onset of a complex free-energy landscape, characterized by an exponentially large number of metastable minima, is pointed out by the cavity method, at the level of 1-step replica symmetry breaking.

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