Excitation Spectra of the Two Impurity Anderson Model. II. Interplay between the Kondo Effect and the Inter Site Interactions

Osamu Sakai, Yukihiro Shimizu

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41 Citations (Scopus)

Abstract

Excitation spectra of the two impurity Anderson model are calculated for various parameter regions of the f-f transfer, t, c-f hybridization and the exchange coupling between local spins. The parity dependent potential scattering suppresses the critical transition pointed out by Jones et al. In the case of small t, the parity splitting of the f-level is given by t/Z, where Z is the enhancement factor of the specific heat in the single impurity problem. In the case of large t, γ of the electronic specific heat decreases drastically and the parity splitting increases largely. The splitting remains to be order of t/Z if the induced kinetic exchange coupling is compensated by other mechanism. The fluctuation of the singlet non-uniform superconductivity is relatively large in the electron-hole asymmetric case, but its intensity is about 1/10 of the antiferromagnetic one.

Original languageEnglish
Pages (from-to)2348-2358
Number of pages11
Journaljournal of the physical society of japan
Volume61
Issue number7
DOIs
Publication statusPublished - 1992 Jul

Keywords

  • heavy fermion
  • numerical renormalization group
  • two impurity Anderson model
  • two impurity Kondo problem

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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