TY - JOUR
T1 - Helium prewetting and nonwetting on weak-binding substrates
AU - Cheng, E.
AU - Cole, Milton W.
AU - Saam, W. F.
AU - Treiner, J.
PY - 1991
Y1 - 1991
N2 - New wetting and nonwetting phenomena for He4 adsorbed on weak-binding substrates such as the alkali metals are predicted. With a nonlocal density-functional model, we calculate the density profile of He4 films adsorbed on surfaces characterized by an attractive van der Waals potential tail of strength C3 and a well depth D. As a function of C3 and D, He4 films exhibit both nonwetting and wetting, the latter being accompanied by a prewetting transition. Specifically, we find that He4 will not wet all the alkali metals; only on Li and Na is wetting behavior, with prewetting, expected.
AB - New wetting and nonwetting phenomena for He4 adsorbed on weak-binding substrates such as the alkali metals are predicted. With a nonlocal density-functional model, we calculate the density profile of He4 films adsorbed on surfaces characterized by an attractive van der Waals potential tail of strength C3 and a well depth D. As a function of C3 and D, He4 films exhibit both nonwetting and wetting, the latter being accompanied by a prewetting transition. Specifically, we find that He4 will not wet all the alkali metals; only on Li and Na is wetting behavior, with prewetting, expected.
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U2 - 10.1103/PhysRevLett.67.1007
DO - 10.1103/PhysRevLett.67.1007
M3 - Article
C2 - 10045046
AN - SCOPUS:0000809912
SN - 0031-9007
VL - 67
SP - 1007
EP - 1010
JO - Physical review letters
JF - Physical review letters
IS - 8
ER -