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Longitudinal electric response and loss-function of metallic microspheres and voids

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Zeitschrift für Physik B Condensed Matter

Abstract

The response of a spherical metallic particle and a void in a metal on an arbitrary external electrical (gradient) field is given analytically within two models: a macroscopic dielectric description in terms of dielectric functions and a linearized hydrodynamic theory which takes into account boundary effects as well as spatial dispersion. From the response functions, the eigenfrequencies of the collective modes and the electron-energy-loss function are obtained. For small radii we found collective modes extending beyond the classical ℓ = ∞ limit of surface-plasmons up to the volume-plasmon. Concerning electron-energy-losses, our results demonstrate that the “blue-shift” on the collective modes which were observed in potassium clusters or calculated for voids in metals are almost of classical origin and stem from spatial dispersion.

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Author notes

  1. M. Mensch

    Present address: Institut für Umweltphysik der Universität, D-69120, Heidelberg, Germany

  2. H. Zohm

    Present address: Max Planck Institut für Plasmaphysik, D-85748, Garching, Germany

Authors and Affiliations

  1. Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, D-76128, Karlsruhe, Germany

    R. v. Baltz, M. Mensch & H. Zohm

Authors
  1. R. v. Baltz
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  2. M. Mensch
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  3. H. Zohm
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v. Baltz, R., Mensch, M. & Zohm, H. Longitudinal electric response and loss-function of metallic microspheres and voids. Z. Physik B - Condensed Matter 98, 151–161 (1995). https://doi.org/10.1007/BF01324520

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  • DOI: https://doi.org/10.1007/BF01324520

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