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Novel low-energy collective excitation at metal surfaces

AuthorsSilkin, Viatcheslav M.; García-Lekue, Aran; Pitarke, José María ; Chulkov, Eugene V. ; Zaremba, E.; Echenique, Pedro M.
Issue Date2004
PublisherIOP Publishing
EDP Sciences
CitationEurophysics Letters 66(2): 260-264 (2004)
AbstractA novel collective excitation is predicted to exist at metal surfaces where a two-dimensional surface state band coexists with the underlying three-dimensional continuum. This is a low-energy acoustic plasmon with linear dispersion at small wave vectors. Since new modern spectroscopies are especially sensitive to surface dynamics near the Fermi level, the existence of surface-state–induced acoustic plasmons is expected to play a key role in a large variety of new phenomena and to create situations with potentially new physics.
Publisher version (URL)https://doi.org/10.1209/epl/i2003-10184-1
Appears in Collections:(CFM) Artículos
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