Self-Consistent Dynamical Theory for the Anderson Lattice

Chang Il Kim, Tadao Kasuya, Yoshio Kuramoto

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

This paper presents formulation and results of a self-consistent dynamical theory which can describe the crossover from the local-moment state to the heavy-fermion state with decreasing temperatures. The theory is an extension of the non-crossing approximation (NCA) for the single-site model and incorporates the intersite interaction via self-consistent modification of the conduction-electron propagator. Detailed numerical results for single-particle excitations are presented which show that (i) the cooperative enhancement of the Kondo resonance occurs at temperatures higher than the Kondo temperature TK; (ii) a pseudogap develops around the energy of the Kondo resonance with decreasing temperatures; (iii) no new energy scale other than TK is generated in the heavy-fermion state.

Original languageEnglish
Pages (from-to)2414-2425
Number of pages12
Journaljournal of the physical society of japan
Volume59
Issue number7
DOIs
Publication statusPublished - 1990
Externally publishedYes

Keywords

  • Anderson lattice
  • Fermi liquid
  • Kondo effect
  • heavy fermion
  • self-consistent perturbation theory

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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