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Band structure effects on the Be(0001) acoustic surface plasmon energy dispersion

AutorSilkin, Viatcheslav M.; Pitarke, José María ; Chulkov, Eugene V. ; Diaconescu, B.; Pohl, K.; Vattuone, L.; Savio, L.; Hofmann, Ph.; Farías, D.; Rocca, M.; Echenique, Pedro M.
Palabras claveDensity functional theory, local density approximation, gradient and other corrections
Exchange, correlation, dielectric and magnetic response functions, plasmons
Surface states, band structure, electron density of states
Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
Fecha de publicación9-may-2008
EditorJohn Wiley & Sons
CitaciónPhysica Status Solidi (a) 205(6), 1307 (2008).
ResumenWe report first-principles calculations of acoustic surface plasmons on the (0001) surface of Be, as obtained in the random-phase approximation of many-body theory. The energy dispersion of these collective excitations has been obtained along two symmetry directions. Our results show a considerable anisotropy of acoustic surface plasmons, and underline the capability of experimental measurements of these plasmons to map the electron-hole excitation spectrum of the quasi two-dimensional Shockley surface state band that is present on the Be(0001) surface.
Descripción22 pp.-- PACS nrs.: 71.15.Mb, 71.45.Gm, 73.20.At, 73.20.Mf.-- Pre-print version available at: http://arxiv.org/abs/0806.2364.
Versión del editorhttp://dx.doi.org/10.1002/pssa.200778156
URIhttp://hdl.handle.net/10261/7346
DOI10.1002/pssa.200778156
ISSN0031-8965
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