Multi-pair excitations in an electron liquid

Single (particle-hole)-pair excitations, as described in the well-known Lindhard function, are restricted to a strip in the ( q, ω) plane — the so-called particle-hole continuum. We present a perturbational analysis of the dynamic dielectric function allowing a generalization of this property for n-...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 1996-07, Vol.115 (1), p.23-26
Main Authors: Bachlechner, M.E., Holas, A., Böhm, H.M., Schinner, A.
Format: Article
Language:English
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Summary:Single (particle-hole)-pair excitations, as described in the well-known Lindhard function, are restricted to a strip in the ( q, ω) plane — the so-called particle-hole continuum. We present a perturbational analysis of the dynamic dielectric function allowing a generalization of this property for n-pair contributions. Consequences for the electron energy-loss function and related quantities are discussed.
ISSN:0168-583X
1872-9584
DOI:10.1016/0168-583X(95)01512-4