Electronic orders induced by Kondo effect in non-Kramers f-electron systems

Yoshio Kuramoto, Shintaro Hoshino, Junya Otsuki

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

This paper clarifies the microscopic nature of the staggered scalar order, which is specific to even number of f electrons per site. In such systems, crystalline electric field (CEF) can make a singlet ground state. As exchange interaction with conduction electrons increases, the CEF singlet at each site gives way to Kondo singlets. The collective Kondo singlets are identified with itinerant states that form energy bands. Near the boundary of itinerant and localized states, a new type of electronic order appears with staggered Kondo and CEF singlets. We present a phenomenological three-state model that qualitatively reproduces the characteristic phase diagram, which have been obtained numerically with use of the continuous-time quantum Monte Carlo combined with the dynamical mean-field theory. The scalar order observed in PrFe4P12 is ascribed to this staggered order accompanying charge density wave (CDW) of conduction electrons. Accurate photoemission and tunneling spectroscopy should be able to probe sharp peaks both below and above the Fermi level in the ordered phase.

Original languageEnglish
Article numberSA018
Journaljournal of the physical society of japan
Volume80
Issue numberSUPPL. A
DOIs
Publication statusPublished - Jul 1 2011
Externally publishedYes

Keywords

  • Charge density wave
  • Crystalline electric field singlet
  • Dynamical mean-field theory
  • Kondo effect
  • PrFeP
  • Quantum Monte Carlo

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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