Frequency-dependent local interactions and low-energy effective models from electronic structure calculations

F. Aryasetiawan, M. Imada, A. Georges, G. Kotliar, S. Biermann, A. I. Lichtenstein

Research output: Contribution to journalArticle

372 Citations (Scopus)

Abstract

We propose a systematic procedure for constructing effective models of strongly correlated materials. The parameters, in particular the on-site screened Coulomb interaction U, are calculated from first principles, using the random-phase approximation. We derive an expression for the frequency-dependent U(ω) and show, for the case of nickel, that its high-frequency part has significant influence on the spectral functions. We propose a scheme for taking into account the energy dependence of U(ω), so that a model with an energy-independent local interaction can still be used for low-energy properties.

Original languageEnglish
Article number195104
Pages (from-to)1-8
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number19
DOIs
Publication statusPublished - 2004 Nov 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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