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Dielectric screening and band-structure effects in low-energy photoemission

AuthorsKrasovskii, E. E.; Silkin, Viatcheslav M.; Nazarov, V. U.; Echenique, Pedro M. ; Chulkov, Eugene V.
Issue DateSep-2010
PublisherAmerican Physical Society
CitationPhysical Review B 82(12): 125102 (2010)
AbstractNonlocal response of the surface to the incident light is included into an ab initio one-step photoemission theory. Surface-state normal emission spectra from Be(0001) and Al(100) are calculated by a full-potential scattering method and are found to agree well with the experiment in a wide energy range. The total exciting field is obtained within the random-phase approximation for jellium as well as for one-dimensional crystal models of the two surfaces. Material dependence of the multipole plasmon mode and strong effect of band structure on the photoyield is discussed.
Description5 páginas, 3 figuras.-- PACS number(s): 79.60.-i, 73.20.Mf
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.82.125102
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