The electron--phonon coupling at the Mo(112) surface.

ABSTRACT

We investigated the electron-phonon coupling (EPC), in the vicinity of the Fermi level, for the surface-weighted states of Mo(112) from high resolution angle-resolved photoemission data taken parallel to the surface corrugation (i.e. [Formula see text]). The surface-weighted bandwidth may be discussed in terms of electron-electron interactions, electron impurity scattering and electron-phonon coupling and exhibits a mass enhancement factor λ = 0.42, within the Debye model, determined from the experimentally derived self-energy. Gold overlayers suppress the mass enhancement of the Mo(112) surface-weighted band crossing the Fermi level at 0.54 Å(-1).