Organ-pipe modes of sodium epitaxial multilayers on Cu(001) observed by inelastic helium-atom scattering
- 16 November 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 69 (20), 2951-2954
- https://doi.org/10.1103/physrevlett.69.2951
Abstract
Inelastic helium-atom scattering from epitaxial films (2–20 monolayers) of sodium on Cu(001) reveals a large number of nearly dispersionless phonon modes whose frequencies depend on the thickness and scale as the lower harmonics of an open-ended organ pipe. These data provide evidence for confined acoustic resonances, corresponding to longitudinal standing waves normal to the surface with frequencies about 20% larger than in the bulk.Keywords
This publication has 13 references indexed in Scilit:
- Electron-Energy-Band Determination by Photoemission from Overlayer StatesPhysical Review Letters, 1988
- Quantitative evaluation of the perfection of an epitaxial film grown by vapor deposition as determined by thermal energy atom scatteringJournal of Crystal Growth, 1988
- Discrete Valence-Electron States in Thin Metal Overlayers on a MetalPhysical Review Letters, 1987
- Elastic surface wave anomalies near the cluster-to-layer transition of Au on NaClSolid State Communications, 1986
- Lattice dynamics of rare gas multilayers on the Ag(111) surface: Theory and experimentThe Journal of Chemical Physics, 1985
- Determination of the Surface Phonon Dispersion Relations for Monolayer, Bilayer, Trilayer, and Thick Kr(111) Films Physisorbed on Ag(111) by Inelastic He ScatteringPhysical Review Letters, 1985
- Theory of Brillouin scattering from surface acoustic phonons in supported filmsJournal of Physics C: Solid State Physics, 1983
- Charge-density waves and isotropic metalsAdvances in Physics, 1978
- Excitations and thermodynamics for liquid-helium filmsPhysical Review B, 1975
- Verification of the Lifshitz Theory of the van der Waals Potential Using Liquid-Helium FilmsPhysical Review A, 1973