Ab Initio Evaluation of Plasmon Lifetimes in the Alkali Metals

Details Ab Initio Evaluation of Plasmon Lifetimes in the Alkali Metals Ab Initio Evaluation of Plasmon Lifetimes in the Alkali Metals

1998-09-02

arxiv.org/abs/cond-mat/9809054v1

Physics

Condensed Matter

Materials Science

14 pages, 4 figures, for html version of the paper, see http://web.utk.edu/~weiku/research/

Scientific paper

The anomalous plasmon linewidth dispersion (PLD) measured in K by vom Felde, Sprosser-Prou, and Fink (Phys. Rev. B 40, 10181 (1989)), has been attributed to strong dynamical electron-electron correlations. On the basis of ab initio response calculations, and detailed comparison with experiment, we show that the PLD of K is, in fact, dominated by decay into particle-hole excitations involving empty states of d-symmetry. For Li, we shed new light on the physics of the PLD. Our all-electron results illustrate the importance of ab initio methods for the study of electronic excitations.

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