Crossover between monopole and multipole plasmon of Cs monolayers on Si(111) individually resolved in energy and momentum

Zielasek, V.; Rönitz, N.; Henzler, M.; Pfnür, Herbert

Original version

Zielasek, V.; Rönitz, N.; Henzler, M.; Pfnür, H.: Crossover between monopole and multipole plasmon of Cs monolayers on Si(111) individually resolved in energy and momentum. In: Physical Review Letters 96 (2006), Nr. 19, 196801. DOI: https://doi.org/10.1103/PhysRevLett.96.196801

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/2779

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Abstract:
The evolution of the plasmon spectrum of the Si(111) (7×7)-Cs surface has been studied by energy loss spectroscopy individually resolved in energy and momentum during the transition from substrate to Cs overlayer metallization. The multipole plasmon is identified by an extremely narrow angular distribution of the inelastic electron scattering, unaccounted for by standard dipole scattering theory. A crossover between multipole and monopole surface plasmon is observed at finite surface wave vectors q∥, depending on Cs coverage, and reveals a high sensitivity of the short-wavelength multipole components on surface morphology. © 2006 The American Physical Society.
License of this version:	Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Publication type:	Article
Publishing status:	publishedVersion
Publication date:	2006
Keywords english:	Coatings, Electron scattering, Metallizing, Morphology, Phase transitions, Plasmas, Silicon compounds, Dipole scattering, Energy loss spectroscopy, Inelastic electron scattering, Plasmon spectrum, Monolayers
DDC:	530 \| Physik