Hole dynamics in a quantum-well state at Na/Cu(111)

V. Chulkov, M. Silkin, M. Echenique, V. Chulkov, M. Echenique, J. Kliewer, R. Berndt, B. Hellsing, S. Crampin

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82 Scopus citations

Abstract

Theoretical calculations and scanning-tunneling spectroscopy measurements of the hole lifetime broadening, τ-1, in a quantum-well state for 0.95 and 1.0 monolayers of Na on Cu(111) are reported. A model potential is proposed for calculating quantum-well states in a monolayer on metal surfaces. The inelastic electron-electron contribution, τ-1e-e, is evaluated within the GW approximation by using eigenfunctions and eigenenergies obtained with this model potential. The electron-phonon contribution, τ-1e-ph, is computed by employing Debye and Einstein models as well as a first-principle ultrasoft pseudopotential method. The obtained theoretical results are in excellent agreement with experimental data, both showing a surprisingly large difference in the lifetime broadening for 0.95 and 1.0 monolayers which is attributed mostly to changes in the electronic structure.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number19
DOIs
StatePublished - Nov 15 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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