AVS 47th International Symposium
    Surface Science Monday Sessions
       Session SS2+EL-MoA

Paper SS2+EL-MoA3
Fermi Contours and Adsorbate Phonon Anomalies for Li/Mo(110) and Li/W(110)

Monday, October 2, 2000, 2:40 pm, Room 209

Session: Electronic Structure and Excitations
Presenter: E. Rotenberg, Lawrence Berkeley National Laboratory
Authors: E. Rotenberg, Lawrence Berkeley National Laboratory
S.D. Kevan, University of Oregon
Correspondent: Click to Email
Angle-resolved photoemission was used to measure the Fermi contours of surface-localized states on the Mo(110) and W(110) surfaces with varying amounts of adsorbed lithium up to 1 ML. In analogy with recent results for H on Mo and W(110), we find that the contours are well nested and therefore can drive a surface phonon anomaly. The nesting vector parallel to the @Sigma@ azimuth on Mo(110) at monolayer coverage is in good agreement with recent phonon measurements.@footnote 1@ We also report the variation of this nesting vector as a function of coverage, and show that a more complete understanding of the electron-phonon coupling on these surfaces might be obtained from coverage-dependent measurements of surface phonon dispersion relations. Finally, our results suggest even better nesting along the @Gamma@ --> S direction and that a more pronounced anomaly might be observed there. @FootnoteText@ @footnote 1@J. Kroger, D. Bruchmann, S. Lehwald, and H. Ibach, Surface Science 449(1-3),227 (2000).