Abstract
We investigate the properties of a system of He4 atoms at the absolute zero of temperature interacting via a Lennard-Jones potential, and constrained to motion in two dimensions by an otherwise inert substrate. Results of a semiclassical calculation indicate that the ground state is that of a self-bound liquid. It further indicates that a close-packed-solid configuration is not self-bound. A quantum-mechanical variational calculation is performed to obtain an upper bound on the energy of the system. A result of -0.61 A°K per particle is obtained at a density of 0.035 A-2. The relationship between this calculation and recent experiments on He4 monolayers is briefly discussed.
Original language | English (US) |
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Pages (from-to) | 691-696 |
Number of pages | 6 |
Journal | Physical Review A |
Volume | 3 |
Issue number | 2 |
DOIs | |
State | Published - 1971 |
Externally published | Yes |