Acoustic surface plasmons in the noble metals Cu, Ag, and Au
- 27 September 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 72 (11), 115435
- https://doi.org/10.1103/physrevb.72.115435
Abstract
We have performed self-consistent calculations of the dynamical response of the (111) surface of the noble metals Cu, Ag, and Au. Our results indicate that the partially occupied surface-state band in these materials yields the existence of acoustic surface plasmons with linear dispersion at small wave vectors. Here we demonstrate that the sound velocity of these low-energy collective excitations, which had already been predicted to exist in the case of Be(0001), is dictated not only by the Fermi velocity of the two-dimensional surface-state band but also by the nature of the decay and penetration of the surface-state orbitals into the solid. Our linewidth calculations indicate that acoustic surface plasmons should be well defined in the energy range from zero to .
Keywords
This publication has 23 references indexed in Scilit:
- Theory of acoustic surface plasmonsPhysical Review B, 2004
- Decay of electronic excitations at metal surfacesSurface Science Reports, 2004
- Novel low-energy collective excitation at metal surfacesEurophysics Letters, 2004
- Electronic excitations by chemical reactions on metal surfacesSurface Science Reports, 2002
- Dispersion and Damping of a Two-Dimensional Plasmon in a Metallic Surface-State BandPhysical Review Letters, 2001
- Collective effects in condensed conducting phases including low-dimensional systemsAdvances in Physics, 1995
- Electronic properties of two-dimensional systemsReviews of Modern Physics, 1982
- Surface electronic structureReports on Progress in Physics, 1982
- Polarizability of a Two-Dimensional Electron GasPhysical Review Letters, 1967
- Plasma Losses by Fast Electrons in Thin FilmsPhysical Review B, 1957