Multi-pair excitations in an electron liquid
Abstract
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.
- Publication:
-
Nuclear Instruments and Methods in Physics Research B
- Pub Date:
- July 1996
- DOI:
- 10.1016/0168-583X(95)01512-4
- Bibcode:
- 1996NIMPB.115...23B