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

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

Research output: Contribution to journalArticle

345 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
Externally publishedYes

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Electronic structure
electronic structure
Coulomb interactions
Nickel
interactions
energy
nickel
approximation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Frequency-dependent local interactions and low-energy effective models from electronic structure calculations. / Aryasetiawan, F.; Imada, Masatoshi; Georges, A.; Kotliar, G.; Biermann, S.; Lichtenstein, A. I.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 70, No. 19, 195104, 01.11.2004, p. 1-8.

Research output: Contribution to journalArticle

Aryasetiawan, F. ; Imada, Masatoshi ; Georges, A. ; Kotliar, G. ; Biermann, S. ; Lichtenstein, A. I. / Frequency-dependent local interactions and low-energy effective models from electronic structure calculations. In: Physical Review B - Condensed Matter and Materials Physics. 2004 ; Vol. 70, No. 19. pp. 1-8.
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