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  Femtosecond electron dynamics at adsorbate–metal interfaces and the dielectric continuum model

Hotzel, A., Moos, G., Ishioka, K., Wolf, M., & Ertl, G. (1999). Femtosecond electron dynamics at adsorbate–metal interfaces and the dielectric continuum model. Applied Physics B: Lasers and Optics, 68(3), 615-622. doi:10.1007/s003400050674.

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Hotzel, Arthur1, Autor           
Moos, Gunnar1, Autor           
Ishioka, K.2, Autor           
Wolf, Martin1, Autor           
Ertl, Gerhard1, Autor           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2Fritz Haber Institute, Max Planck Society, ou_24021              

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 Zusammenfassung: Femtosecond time-resolved two-photon photoemission (2PPE) spectroscopy is employed to investigate the electron dynamics of image potential states on physisorbed Xe and N2 overlayers adsorbed on Cu(111). With increasing number of adsorbate layers the binding energies of the image potential states are found to decrease while their lifetimes increase (except for the second image potential state on 2 to 3 ML Xe/Cu(111)). These trends are most pronounced for nitrogen, where the binding energy of the first image potential state decreases by a factor of 3.5 from 0 to 2 ML N2/Cu(111);at the same time the lifetime increases from 22 to 700 fs. The results are discussed in the framework of the dielectric continuum model, which approximates the adsorbate layers by a dielectric slab in front of the metal surface. For Xe,the agreement between measured and calculated lifetimes improves significantly if the full dispersion curve of the Xe 6s conduction band is taken into account.

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Sprache(n): eng - English
 Datum: 1998-11-021999-03
 Publikationsstatus: Erschienen
 Seiten: 8
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1007/s003400050674
 Art des Abschluß: -

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Titel: Applied Physics B: Lasers and Optics
  Andere : Appl. Phys. B: Lasers O.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Heidelberg : Springer-Verlag
Seiten: 8 Band / Heft: 68 (3) Artikelnummer: - Start- / Endseite: 615 - 622 Identifikator: ISSN: 0946-2171
CoNE: https://pure.mpg.de/cone/journals/resource/954928582870