Many-body effects in angle-resolved photoemission: Quasiparticle energy and lifetime of a Mo(110) surface state

Authors
Valla, T Fedorov, AV Johnson, PD Hulbert, SL
Citation
T. Valla et al., Many-body effects in angle-resolved photoemission: Quasiparticle energy and lifetime of a Mo(110) surface state, PHYS REV L, 83(10), 1999, pp. 2085-2088
Citations number
19
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
10
Year of publication
1999
Pages
2085 - 2088
Database
ISI
SICI code
0031-9007(19990906)83:10<2085:MEIAPQ>2.0.ZU;2-6
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 a re investigated. Electron-phonon coupling, electron-electron interactions, and scattering from defects are all identified mechanisms responsible for t he finite lifetime of a valence photohole. The electron-phonon induced mass enhancement and rapid change of the photohole lifetime near the Fermi leve l are observed for the first time.