Renormalized Perturbation Approach for Examination of Itinerant-Localized Duality Model for Strongly Correlated Electron Systems

Yukihiro Okuno, Osamu Narikiyo, Kazumasa Miyake

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present a microscopic examination for the itinerant-localized duality model which has been proposed to understand anomalous properties of strongly correlated systems like the heavy fermions by Kuramoto and Miyake, and also useful to describe the anomalous properties of the high-Tc cupurates. The action of the duality model consists of two components of dynamical degrees of freedom. One of them is coherent itinerant degree of fermion and the other is incoherent localized one describing mainly the spin which has not been explicitly considered so far. We show that the thermodynamic potential of the strongly interacting Hubbard model can be rearranged in the form of duality model on the basis of renormalized perturbation expansion of the Luttinger-Ward functional if the one-particle spectral weight exhibits triple peak structure. We also examine the incoherent degrees of freedom described as a "localized spin" and show on the basis of the pertubation expansion that there exists commensurate superexchange-type interaction among the "localized spins".

Original languageEnglish
Pages (from-to)2389-2398
Number of pages10
Journaljournal of the physical society of japan
Volume66
Issue number8
DOIs
Publication statusPublished - Aug 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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