Abstract
We calculate the shift in wetting temperature TW of a He film on a layered substrate. The latter consists of an alkali metal layer film of thickness d, deposited on a semi-infinite medium. TW can change from nonzero to zero (Cs) or vice versa (Na) as d changes. The shift is an extremely sensitive probe of long range van der Waals potentials.
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Eq. 49.2 of D. Langbein, Theory of van der Waals Attraction (Springer, Berlin, 1974).
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Cheng, E., Cole, M.W., Saam, W.F. et al. Wetting temperature shift of helium on a layered substrate. J Low Temp Phys 89, 739–742 (1992). https://doi.org/10.1007/BF00694130
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DOI: https://doi.org/10.1007/BF00694130