Electron-phonon mass-enhancement parameter and the Fermi-line eccentricityat the Be(1010) surface from angle-resolved photoemission

Authors
Balasubramanian, T Glans, PA Johansson, LI
Citation
T. Balasubramanian et al., Electron-phonon mass-enhancement parameter and the Fermi-line eccentricityat the Be(1010) surface from angle-resolved photoemission, PHYS REV B, 61(19), 2000, pp. 12709-12712
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
61
Issue
19
Year of publication
2000
Pages
12709 - 12712
Database
ISI
SICI code
0163-1829(20000515)61:19<12709:EMPATF>2.0.ZU;2-D
Abstract
We report angle-resolved photoemission measurements of the dispersion of th e shallow surface state around (A)overbar and the surface electron-phonon m ass-enhancement parameter lambda(s) at the Be(1010) surface. The eccentrici ty of the elliptical Fermi line formed by the surface state is found to be epsilon=0.684. We obtain lambda(s)=0.672 +/- 0.027 along the major axis and lambda(s)= 0.642+/-0.031 along the minor axis of the Fermi line. The lambd a(s) values are about three times larger than the bulk lambda(b) = 0.24.