The electron–phonon coupling at the Mo(112) surface

Authors

Ning Wu, University of Nebraska-Lincoln
Keisuke Fukutani, University of Nebraska-Lincoln
Peter A. Dowben, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2010

Comments

Published in J. Phys.: Condens. Matter 22 (2010) 245501 (7pp)

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. (111)). 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.