Femtosecond electron dynamics of image-potential states on clean and oxygen-covered Pt(111) - art. no. 115420

Authors
Link, S Durr, HA Bihlmayer, G Blugel, S Eberhardt, W Chulkov, EV Silkin, VM Echenique, PM
Citation
S. Link et al., Femtosecond electron dynamics of image-potential states on clean and oxygen-covered Pt(111) - art. no. 115420, PHYS REV B, 6311(11), 2001, pp. 5420
Citations number
39
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6311
Issue
11
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010315)6311:11<5420:FEDOIS>2.0.ZU;2-O
Abstract
We have investigated the lifetimes of image-potential states on the Pt(111) surface with time-resolved two-photon photoemission and first-principles c alculations. Electrons populating the first two image-potential states deca y into bulk states after 26+/-7 and 62+/-7 fs, respectively. This is in agr eement with results of theoretical calculations. Oxygen adsorption reduces the image-potential state lifetimes by a factor of 2. This is caused by a s trong change of the electronic structure near the Fermi level.