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  • 1
    ISSN: 1434-6036
    Keywords: 71.45Gm ; 73.20Mf ; 79.20Kz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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.
    Type of Medium: Electronic Resource
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