ADSORBATE-INDUCED DISTORTION OF SOLID SURFACES. APPLICATION TO HCl ON ICE
AT STRATOSPHERIC CONDITIONS
Author(s): E.V.Vakarin, M.F.Holovko (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 79011 Lviv, Ukraine), J.P.Badiali (Structure et R\'eactivit\'e des Syst\`emes Interfaciaux, Universit\'e Pierre et Marie Curie, 4 Place Jussieu, 75230 Paris Cedex 05, France)
It is shown that the adsorption of HCl molecules at the surface of ice increases, if the HCl binding energy increases with the distortion amplitude of the oxygen sites of ice. At the same time, the adsorption stimulates an increase of the Lindemann parameter for the ice lattice, driving its melting at temperatures ($T=190$ K) relevant to the polar stratosphere. Similar effects take place when the lateral interaction between HCl molecules becomes more attractive due to the coupling through the ice lattice.
Key words: adsorption of HCl on ice, two-dimensional lattice gas, lattice
distortion, surface melting
PACS: 05.70.Np, 68.45.Da, 92.60.Jq
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