Charge Kondo effect toward a non-Fermi-liquid fixed point in the orbitally degenerate exchange model

Hiroaki Kusunose, Yoshio Kuramoto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We show that a Kondo-type model with an orbital degeneracy has a new non-Fermi-liquid fixed point. Near the fixed point the spin degrees of freedom are completely quenched, and the residual charge degrees of freedom lead to the multichannel Kondo effect. Anomalous behavior appears in electric and thermal properties, but the magnetic susceptibility should show the local Fermi-liquid behavior. The non-Fermi-liquid fixed point becomes unstable against perturbations breaking the particle-hole symmetry. We derive these results using the third-order scaling for a spherically symmetric model with a fictitious spin. In contrast to the Coqblin-Schrieffer model, the present model respects different time-reversal properties of multipole operators.

Original languageEnglish
Pages (from-to)1805-1808
Number of pages4
JournalJournal of the Physical Society of Japan
Volume68
Issue number6
DOIs
Publication statusPublished - Jun 1999

Keywords

  • CeB
  • LaMnO
  • Multichannel Kondo effect
  • Multipole
  • Non-Fermi liquid
  • Orbital degeneracy
  • Time-reversal property

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