Single-particle and magnetic excitation spectra of degenerate anderson model with finite f-f coulomb interaction

Osamu Sakai, Yukihiro Shimizu, Tadao Kasuya

Research output: Contribution to journalArticlepeer-review

119 Citations (Scopus)

Abstract

Spectral densities of local single-particle, magnetic and charge excitations are calculated for the impurity Anderson Hamiltonian based on the renormalization group approach. Calculation is made in wide range of energy and for various magnitude of f-f Coulomb interaction constant, Uf, and for degeneracy factor from 2 to 5. The width of the peak at the Fermi level in the single-particle spectrum has always comparable scale to the magnetic excitation energy, and is never larger than the hybridization width. In the BIS side of this sharp peak a broad satellite with large intensity appears as a shoulder when Uf is large and the f-electron number is intermediate larger than 1. The band-like peak in BIS of U-compounds, which has much larger width than that of the usual band theory, is interpreted by this broad satellite.

Original languageEnglish
Pages (from-to)3666-3678
Number of pages13
Journaljournal of the physical society of japan
Volume58
Issue number10
DOIs
Publication statusPublished - 1989

Keywords

  • BIS
  • Charge excitation
  • Excitation spectra
  • Impurity Anderson model
  • Magnetic excitation
  • PES
  • Renormalization group
  • Single-particle excitation
  • Uranium

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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