Jana, Biman ; Bagchi, Biman (2009) Intermittent dynamics, stochastic resonance and dynamical heterogeneity in supercooled liquid water Journal of Physical Chemistry B, 113 (8). pp. 2221-2224. ISSN 1089-5647
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp809722w
Related URL: http://dx.doi.org/10.1021/jp809722w
Abstract
Here we find through computer simulations and theoretical analysis that the low temperature thermodynamic anomalies of liquid water arises from the intermittent fluctuation between its high density and low density forms, consisting largely of 5-coordinated and 4-coordinated water molecules, respectively. The fluctuations exhibit strong dynamic heterogeneity (defined by the four point time correlation function), accompanied by a divergence like growth of the dynamic correlation length, of the type encountered in fragile supercooled liquids. The intermittency has been explained by invoking a two state model often employed to understand stochastic resonance, with the relevant periodic perturbation provided here by the fluctuation of the total volume of the system.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
ID Code: | 3972 |
Deposited On: | 13 Oct 2010 07:08 |
Last Modified: | 07 Jan 2011 05:48 |
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