Quasiparticle energies in small metal clusters
Journal Article
·
· Physical Review (Section) B: Condensed Matter; (USA)
- Department of Physics, University of California, Berkeley, California 94720 (US) Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720
We have calculated the quasiparticle energies of sodium and potassium clusters using the jellium-sphere-background model for positive-ion cores and the Hedin {ital GW} approximation for the self-energies of valence electrons. In the calculation of the screened Coulomb interaction, a new general method to approximate the excitation spectrum of the interacting many-body systems is introduced. The calculated ionization potentials and quasiparticle energies are significantly improved compared to calculations based on the Hohenberg-Kohn-Sham local-density-functional theory.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5485965
- Journal Information:
- Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:6; ISSN 0163-1829; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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