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Surface-state hole decay mechanisms: The Be(0001) surface

AuthorsSilkin, Viatcheslav M.; Balasubramanian, E. V.; Chulkov, Eugene V. ; Rubio, Angel; Echenique, Pedro M.
Issue Date2001
PublisherAmerican Physical Society
CitationPhysical Review B 64: 85334 (2001)
AbstractFirst-principle calculations and angle-resolved photoemission experiments are combined to analyze the different contributions to the surface-state hole dynamics at the Be(0001) surface. The computed inelastic electron-electron scattering rate γ is in good agreement with experiment once the electron-phonon contribution is subtracted. γ is strongly influenced by details of the surface band structure. In particular, the intraband transitions within the surface state itself ignored in traditional Fermi liquid theory contribute 65%-85% to γ. This intraband contribution and the highly spatial nonlocality of the self-energy makes the energy and momentum dependence of γ to be ∝(EF-E)α (with α<2) in contrast to the observed α≅2 value in noble and transition metal surfaces.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.64.085334
Identifiersdoi: 10.1103/PhysRevB.64.085334
issn: 1098-0121
e-issn: 1550-235X
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