Strongly correlated phenomena in Pr-based filled skutterudite compounds detected by neutron scattering

Masahumi Kohgi, Kazuaki Iwasa, Keitaro Kuwahara

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Recent neutron scattering studies on the Pr-based filled skutterudite compounds, which show strongly correlated phenomena, are reviewed. It was found that the 4f electron states of PrFe4 P12 and PrRu4 P12 are strongly hybridized with conduction electrons. It is consistent with the heavy-fermion properties observed for PrFe4 P12. These states turn out to be the quadrupole ordering state (PrFe4 P12) or the charge density wave state (PrRu4 P12) at low temperatures. The lowest crystal field excited state of PrOs4Sb12 was found to show an excitonic behavior, which is ascribed to the quadrupolar interaction between Pr atoms. The strong temperature dependence of the excitonic excitations through the superconducting phase transition indicates a close correlation of the excitons with the superconductivity of PrOs4 Sb12. The importance of the characteristic Fermi surface topology and the effects of the p-f hybridization is discussed to understand the variety of the strongly correlated phenomena in these compounds based on the experimental results.

Original languageEnglish
Pages (from-to)23-28
Number of pages6
JournalPhysica B: Condensed Matter
Volume385-386 I
Publication statusPublished - 2006 Nov 27


  • Neutron scattering
  • PrFe P
  • PrOs Sb
  • PrRu P
  • Quadrupolar ordering
  • Superconductivuty
  • p-f hybridization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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