Many-Body Effects in Angle-Resolved Photoemission: Quasiparticle Energy and Lifetime of a Mo(110) Surface State

T. Valla; A. V. Fedorov; P. D. Johnson; S. L. Hulbert

doi:10.1103/PhysRevLett.83.2085

Many-Body Effects in Angle-Resolved Photoemission: Quasiparticle Energy and Lifetime of a Mo(110) Surface State

T. Valla, A. V. Fedorov, P. D. Johnson, and S. L. Hulbert

Phys. Rev. Lett. 83, 2085 – Published 6 September 1999

Abstract

In a high-resolution photoemission study of a Mo(110) surface state various contributions to the measured width and energy of the quasiparticle peak are investigated. Electron-phonon coupling, electron-electron interactions, and scattering from defects are all identified mechanisms responsible for the finite lifetime of a valence photohole. The electron-phonon induced mass enhancement and rapid change of the photohole lifetime near the Fermi level are observed for the first time.

Received 28 January 1999

DOI:https://doi.org/10.1103/PhysRevLett.83.2085

Authors & Affiliations

T. Valla¹, A. V. Fedorov¹, P. D. Johnson¹, and S. L. Hulbert²

¹Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000
²National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973-5000