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Photon Energy Dependent Valence Band Response of Metallic Nanoparticles
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science.
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2011 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 107, no 18, 183401- p.Article in journal (Refereed) Published
Abstract [en]

We show that the valence band response to photon impact in metallic nanoparticles is highly energy dependent. This is seen as drastic variations of cross sections in valence photoionization of free and initially charge-neutral nanosized metal clusters. The effect is demonstrated in a combined experimental and theoretical study of Rb clusters. The experimental findings are interpreted theoretically using a jellium model and superatom description. The variations are attributed to the changing overlap with the photon energy between the wave functions of diffuse delocalized valence electrons and continuum electrons producing a series of minima in the cross section.

Place, publisher, year, edition, pages
2011. Vol. 107, no 18, 183401- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-164439DOI: 10.1103/PhysRevLett.107.183401ISI: 000296985900005OAI: oai:DiVA.org:uu-164439DiVA: diva2:468512
Available from: 2011-12-21 Created: 2011-12-20 Last updated: 2017-12-08Bibliographically approved

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Björneholm, Olle

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