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28 March 2024
 
  » arxiv » cond-mat/0507660

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Relation between Rotational and Translational Dynamic Heterogeneities in Water
Marco G. Mazza ; Nicolas Giovambattista ; Francis W. Starr ; H. Eugene Stanley ;
Date 28 Jul 2005
Subject Soft Condensed Matter; Statistical Mechanics | cond-mat.soft cond-mat.stat-mech
AbstractWe use molecular dynamics simulations to probe the rotational dynamics of the SPC/E model of water for a range of temperatures down to 200 K, 13 K above to the mode coupling temperature. We find that rotational dynamics is spatially heterogeneous, i.e., there are clusters of molecules that rotate significantly more than the average for a given time interval, and we study the size and the temporal behavior of these clusters. We find that the position of a rotational heterogeneity is strongly correlated with the position of a translational heterogeneity, and that the fraction of molecules belonging to both kinds of heterogeneities increases with decreasing temperature. We further find that although the two types of heterogeneities are not identical, they are related to the same physical picture.
Source arXiv, cond-mat/0507660
Other source [GID 415435] pmid16486991
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