Elastic- and inelastic-neutron-scattering methods have been used to study the low-temperature properties of argon films adsorbed on graphite. At T=5 K the film forms a two-dimensional triangular lattice incommensurate with the substrate. The spectrum of neutrons inelastically scattered in the plane of the film is found to be consistent with calculations based on a simple two-dimensional phonon model in which interactions with the substrate are neglected.
|Journal||Physical Review Letters|
|Publication status||Published - 1975|