Role of p-f hybridization in the metal-nonmetal transition of PrRu 4P12

Kazuaki Iwasa, Lijie Hao, Tomoo Hasegawa, Toshiaki Takagi, Kenji Horiuchi, Yoshiaki Mori, Youichi Murakami, Keitaro Kuwahara, Masahumi Kohgi, Hitoshi Sugawara, Shanta Ranjan Saha, Yuji Aoki, Hideyuki Sato

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

Electronic state evolution in the metal-nonmetal transition of PrRu 4P12 has been studied by X-ray and polarized neutron diffraction experiments. It has been revealed that, in the low-temperature nonmetallic phase, two inequivalent crystal-field (CF) schemes of Pr 3+ 4f2 electrons with Γ1 and Γ4(2) ground states are located at Pr1 and Pr2 sites forming the bcc unit cell surrounded by the smaller and larger cubic Ruion sublattices, respectively. This modulated electronic state can be explained by the p-f hybridization mechanism taking two intermediate states of 4f1 and 4f3. The p-f hybridization effect plays an important role in the electronic energy gain in the metal-nonmetal transition originated from the Fermi surface nesting.

Original languageEnglish
Pages (from-to)1930-1933
Number of pages4
Journaljournal of the physical society of japan
Volume74
Issue number7
DOIs
Publication statusPublished - 2005 Jul

Keywords

  • Crystal-field state
  • Fermi surface nesting
  • Metal-nonmetal transition
  • p-f hybridization

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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