Anomalous specific heat of supercooled water

Details Anomalous specific heat of supercooled water Anomalous specific heat of supercooled water

2008-07-27

arxiv.org/abs/0807.4267v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

We study by Monte Carlo simulations and mean field calculations the specific heat $C_P$ of a cell model that reproduces known properties of water. In the supercooled regime we find \emph{two} $C_P$ maxima that are strikingly similar to very recent experimental results. We show that the maximum at higher temperature is associated with the fluctuations of hydrogen bond formation and that the second maximum at lower temperature is associated with the cooperativity of the hydrogen bonds. If this cooperativity is not taken into account, the lower temperature maximum disappears. Our finding offers a \emph{thermodynamic} interpretation for the two maxima in $C_P$.

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