Coverage-dependent changes in the electron-phonon coupling in Au/Mo(1 1 2)

Keisuke Fukutani, Yaroslav B. Losovyj, N. Lozova, I. N. Yakovkin, Ning Wu, P. A. Dowben

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We investigated the electron-phonon coupling (EPC), in the vicinity of the Fermi level, for the surface states of the Au-covered Mo(1 1 2) surface from high-resolution angle resolved photoemission data taken parallel to the surface corrugation (i.e. 111). The changes of the widths of the surface weighted bands, induced by Au layers, are discussed in terms of electron-electron interactions, electron impurity scattering and electron-phonon coupling. Gold overlayers suppress the mass enhancement of the Mo(1 1 2) surface band crossing the Fermi level at 0.54 -1. The data indicate that significant contributions from impurity and defect scattering must be considered in any serious analysis of the imaginary part of the self energy and that there are interface effects that can have a profound influence on the imaginary part of the self energy.

Original languageEnglish
Pages (from-to)318-322
Number of pages5
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume184
Issue number3-6
DOIs
Publication statusPublished - 2011 Apr 1

Keywords

  • Electron-phonon coupling
  • Interface effects
  • Mass enhancement
  • Phonon driven impurity scattering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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