Novel low-energy collective excitation at metal surfaces

Abstract

A novel collective excitation is predicted to exist at metal surfaces where a two-dimensional surface-state band coexists with the underlying three-dimensional continuum. This is a low-energy acoustic plasmon with linear dispersion at small wave vectors. Since new modern spectroscopies are especially sensitive to surface dynamics near the Fermi level, the existence of surface-state induced acoustic plasmons is expected to play a key role in a large variety of new phenomena and to create situations with potentially new physics.

arXiv comment6 pages, 3 figures, to appear in Europhys. Lett

References in corpus (2)

• Theory of inelastic lifetimes of low-energy electrons in metals
• Dynamical Screening and Superconducting State in Intercalated Layered Metallochloronitrides

Cited by in corpus (20)

• Theory of surface plasmons and surface-plasmon polaritons
• Acoustic surface plasmons in the noble metals Cu, Ag, and Au
• Acoustic plasmons and "soundarons" in graphene on a metal gate
• Theory of acoustic surface plasmons
• Acoustic plasmons in extrinsic free-standing graphene
• Electron energy-loss and inelastic X-ray scattering cross sections from time-dependent density-functional perturbation theory
• Surface plasmons in metallic structures
• THz Surface Modes and Electron-Phonon Coupling in Bi${}_2$Se${}_3$(111)
• Band structure effects on the Be(0001) acoustic-surface-plasmon energy dispersion
• Metal surface induces strong acoustic plasmons in chemically doped graphene
• Tuning of one-dimensional plasmons by Ag-Doping in Ag-$\sqrt{3}$-ordered atomic wires
• Geometric Effect of High-Resolution Electron Energy Loss Spectroscopy on the Identification of Plasmons: An Example of Graphene
• Unusual Low-Energy Collective Charge Excitations in High-$T_c$ Cuprate Superconductors
• Relativistic response and novel spin-charge plasmon at the Tl/Si(111) surface
• Tuning MgB_2(0001) surface states
• Induced Charge-Density Oscillations at Metal Surfaces
• Plasmaron excitations in p(2x2)-K/Graphite
• Combined effect of doping and temperature on the anisotropy of low-energy plasmons in monolayer graphene
• Dynamical response function of a compressed lithium monolayer
• Photoemission footprints of extrinsic plasmarons