Phys. Rev. B 55, 13835–13841 (1997)Alkali-metal plasmons, pseudopotentials, and optical sum rulesReceived 14 January 1997; published in the issue dated 15 May 1997 Starting from recent experimental and theoretical results on the optical absorption of lithium clusters, we reexamine some effects of the angular-momentum dependence of the electron-ion interaction, a necessary ingredient of accurate valence-only atoms. Our theoretical results are compared to a variety of optical data for alkali-metal atoms, clusters, and bulk solids, and illustrate interesting aspects of the jellium approximation and of optical sum rules, when based on first-principles pseudopotentials. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.55.13835
DOI:
10.1103/PhysRevB.55.13835
PACS:
61.46.+w, 71.15.Hx, 36.40.Vz, 78.20.-e
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