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Title: Hydrogen bond correlated percolation in a supercooled water monolayer as a hallmark of the critical region
Author: Bianco, Valentino
Franzese, Giancarlo
Keywords: Percolació (Física estadística)
Percolation (Statistical physics)
Issue Date: 1-Jul-2019
Publisher: Elsevier B.V.
Abstract: Numerical simulations for a number of water models have supported the possibility of a metastable liquid-liquid critical point (LLCP) in the deep supercooled region. Here we consider a theoretical model for a supercooled liquid water monolayer and its mathematical mapping onto a percolation problem. The mapping allows us to identify the finite-size clusters at any state-point, and the infinite cluster at the critical point, with the regions of correlated hydrogen bonds (HBs). We show that the percolation line coincides with the first-order liquid-liquid phase transition ending at the LLCP. At pressures below the LLCP, the percolation line corresponds to the strong maxima of the thermodynamic response functions and to the locus of maximum correlation length (Widom line). At higher pressures, we find a percolation transition with a positive slope and we discuss its possible relation with the thermodynamics.
Note: Versió postprint del document publicat a:
It is part of: Journal of Molecular Liquids, 2019, vol. 285, p. 727-739
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ISSN: 0167-7322
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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