Abstract
The self-consistent reaction-matrix theory developed for bulk quantum solids is extended to quasi-two-dimensional quantum solids realized by 4 He adsorbed upon graphite. The cohesive energy, chemical potential, spreading pressure, and inverse compressibility at 0 K are calculated for 4 He in the areal density range 0.076–0.120 »−2 . Sound velocities and phonon spectra are also calculated and the characteristic temperatures of the simple twodimensional Debye model are derived. The theoretical results agree well with empirical values.
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