The damping function of the van der Waals attraction in the potential between rare gas atoms and metal surfaces |
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| Affiliation: | 1. Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstrasse 12, A-8700 Leoben, Austria;2. Department of Materials Physics, Montanuniversität Leoben, Jahnstrasse 12, A-8700 Leoben, Austria;1. Advanced Technology Research Laboratories, Panasonic Corporation, 3-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0237, Japan;2. Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan |
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| Abstract: | The physisorption potentials of the rare gases on noble metals recently reported by Chizmeshya and Zaremba [Surf. Sci. 268 (1992) 432] are recalculated with new damping parameters for the van der Waals attraction. The new damping parameters, which are applicable when the repulsive potential is not purely exponential, are consistent with the original analysis of Tang and Toennies. The uncertainties resulting from the two approximate sets of damping parameters used by Chizmeshya and Zaremba are removed, moreover a potential minimum is now predicted for Xe on the Au surfaces for which the previous approximations failed. |
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