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.
|ジャーナル||Journal of Electron Spectroscopy and Related Phenomena|
|出版物ステータス||Published - 2011 4 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Physical and Theoretical Chemistry