A theoretical calculation of the chemical potential, spreading pressure, and inverse compressibility at 0oK is reported for He4 adsorbed on a graphite-like substrate for monolayer densities of 0.10 to 0.13 Å-2. These functions are obtained from a ground-state variational wave function constructed of single-particle functions multiplied by Jastrow correlation factors. Use was made of a cluster expansion in the calculation of the ground-state energy. The theoretical results agree quite well with the empirical values.
Title
Ground-state parameters for the quasi-two-dimensional close-packed He4 solid at high density
Novaco, A. D. (1973). "Ground-state parameters for the quasi-two-dimensional close-packed He4 solid at high density." Physical Review A 8 (6): 3065–3070.