Molecular Beam Studies of Surface Phonons and Gas Surface Interactions
Abstract
Angle and velocity resolved inelastic helium scattering is becoming an incisive tool for probing the vibrational characteristics of clean and adsorbate covered surfaces. These experiments can be visualized as being a two-dimensional (i.e., surface sensitive) analog to inelastic neutron scattering, which has played such a crucial role in elucidating the nature of elementary excitations in bulk crystals. In this paper a general review is presented of our recent work which demonstrates how the surface vibrational properties of epitaxially grown rare gas films evolve, on a layer-by-layer basis, towards those characteristic of thick crystals. Lattice dynamics calculations are used to quantitatively analyze the data. Keywords: Surface phonon spectroscopy, Thin film dynamics, Phonon dispersion relations, Physisorption interactions, Gas- surface energy exchange, Inelastic single phonon scattering, Rare gas interaction potentials, Molecular beams.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1988
- Accession Number
- ADA198435
Entities
People
- Steven J. Sibener
Organizations
- University of Chicago