โ Scribed by X.F. Wang; I. Rhee; F.M. Gasparini
No coin nor oath required. For personal study only.
We report calculations of the superfluid density, pa, of helium confined between Si surfaces, and of the onset temperature for helium films formed on a Mylar substrate.
The calculations are done within +J-theory and include the effect of helium-surface interaction.
We find that this interaction precludes size scaling with the bulk correlation length. The calculated effect however is not enough to explain the experimental results. In the case of the onset temperature, the influence of the van der Waals field causes the effective shift exponent to be less than that of the correlation length.
๐ SIMILAR VOLUMES
The Cb-. CS-. and C'ln-coefficicnts of the asymptotic expansion of the intcrnction energy in terms of powers of I/R are calculated for the p&s of atoms He-He, Be-Be, big-hip, Ca-Ca. The method involves the direct calculation of the "natural states of the subsystem under the interaction". Three appro