The Violation of Stokes-Einstein Relation in Supercooled Water

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dc.creatorChen, Sow-Hsin
dc.creatorMallamace, Francesco
dc.creatorMou, Chung-Yuan
dc.creatorBroccio, Matteo
dc.creatorCorsaro, Carmelo
dc.creatorFaraone, Antonio
dc.creatorLiu, Li
dc.date2006-05-17
dc.date.accessioned2026-07-07T07:09:00Z
dc.date.available2026-07-07T07:09:00Z
dc.descriptionBy confining water in nanopores, so narrow that the liquid cannot freeze, it is possible to explore its properties well below its homogeneous nucleation temperature TH ~ 235 K. In particular, the dynamical parameters of water can be measured down to 180 K approaching the suggested glass transition temperature Tg ~ 165 K. Here we present experimental evidence, obtained from Nuclear Magnetic Resonance and Quasi-Elastic Neutron Scattering spectroscopies, of a well defined decoupling of transport properties (the self-diffusion coefficient and the average translational relaxation time), which implies the breakdown of the Stokes-Einstein relation. We further show that such a non-monotonic decoupling reflects the characteristics of the recently observed dynamic crossover, at about 225 K, between the two dynamical behaviors known as fragile and strong, which is a consequence of a change in the hydrogen bond structure of liquid water.
dc.description5 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0605431
dc.identifierhttp://arxiv.org/abs/cond-mat/0605431
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/110912
dc.subjectSoft Condensed Matter
dc.titleThe Violation of Stokes-Einstein Relation in Supercooled Water
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