Plasmon lifetime, zone-boundary collective states, and energy-loss spectra of lithium

K. Karlsson and F. Aryasetiawan
Phys. Rev. B 52, 4823 – Published 15 August 1995
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Abstract

We have calculated the plasmon-width dispersion of Li within the random-phase approximation including the full band structure. The dispersion is found to be negative for small momentum transfers, which is in agreement with experiment. This anomaly is due to the band structure. The energy-loss spectra are found to exhibit a small peak at low energy which can be traced back to the gap at the zone boundaries. This confirms the interpretation of the peak as a so called zone-boundary collective state.

  • Received 19 January 1995

DOI:https://doi.org/10.1103/PhysRevB.52.4823

©1995 American Physical Society

Authors & Affiliations

K. Karlsson

  • Department of Theoretical Physics, University of Lund, Sölvegatan 14A, 22362 Lund, Sweden
  • Department of Engineering Science, Högskolan i Skövde, 54128 Skövde, Sweden

F. Aryasetiawan

  • Department of Theoretical Physics, University of Lund, Sölvegatan 14A, 22362 Lund, Sweden

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Vol. 52, Iss. 7 — 15 August 1995

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