Structure and fluctuations of the premelted liquid film of ice at the triple point



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Benet, Jorge and Llombart, Pablo and Sanz García, Eduardo and MacDowell, Luis G. (2019) Structure and fluctuations of the premelted liquid film of ice at the triple point. Molecular Physics, 117 . pp. 2846-2864.

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In this paper we study the structure of the ice/vapor interface in the neighborhood of the triple point for the TIP4P/2005 model. We probe the fluctuations of the ice/film and film/vapor surfaces that separate the liquid film from the coexisting bulk phases at basal, primary prismatic and secondary prismatic planes. The results are interpreted using a coupled sine Gordon plus Interface Hamiltonian model. At large length-scales, the two bounding surfaces are correlated and behave as a single complex ice/vapor interface. For small length, on the contrary, the ice/film and film/vapor surfaces behave very much like independent ice/water and water/vapor interfaces. The study suggests that the basal facet of the TIP4P/2005 model is smooth, the prismatic facet is close to a roughening transition, and the secondary prismatic facet is rough. For the faceted basal face, our fluctuation analysis allows us to estimate the step free energy in good agreement with experiment. Our results allow for a quantitative characterization of the extent to which the adsorbed quasi-liquid layer behaves as water, and explains experimental observations which reveal similar activation energies for crystals grown in bulk vapor or bulk water.

Item Type:Article
Uncontrolled Keywords:Roughening; Premelting, Layering; Surface Melting; Quasi-liquid layer; Capillary Waves; Sine Gordon model.
Subjects:Sciences > Physics > Atmospheric physics
Sciences > Physics > Chemistry, Physical and theoretical
Sciences > Physics > Surfaces (Physics)
Sciences > Chemistry
Sciences > Chemistry > Water
ID Code:59378
Deposited On:01 Apr 2020 07:19
Last Modified:01 Apr 2020 09:50

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