Electronic structure of the novel filled skutterudite PrPt 4Ge12 superconductor

Yoshiaki Nakamura, Hiroyuki Okazaki, Rikiya Yoshida, Takanori Wakita, Masaaki Hirai, Yuji Muraoka, Hiroyuki Takeya, Kazuto Hirata, Hiroshi Kumigashira, Masaharu Oshima, Takayoshi Yokoya

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8 Citations (Scopus)

Abstract

We have performed soft x-ray photoemission spectroscopy (SXPES) and resonant photoemission spectroscopy (RPES) of the filled skutterudite superconductor PrPt4Ge12 in order to study the electronic structure of valence band and the character of Pr 4f. SXPES of PrPt 4Ge12 measured with 1200 eV photon energy, where spectral contribution of Pr 4f is negligible, was found nearly identical with that of LaPt4Ge12, indicating similarity of Pt-Ge derived electronic states of the two compounds. Good correspondence with band calculations allows us to ascribe the dominant Ge 4p character of the density of states at the Fermi level (EF). Pr 3d → 4f RPES shows that, although Pr 4f electrons in PrPt4Ge12 are not as strongly hybridized with conduction electrons near EF as in PrFe 4P12, there are finite Pr 4f contribution to the states near EF in PrPt4Ge12. These PES results give the information of fundamental electronic structure for understanding the physical properties of the novel filled skutterudite superconductor PrPt 4Ge12.

Original languageEnglish
Article number124701
Journaljournal of the physical society of japan
Volume79
Issue number12
DOIs
Publication statusPublished - Dec 2010

Keywords

  • Electronic structure
  • Filled skutterudite
  • Pr 3d → 4f resonant photoemission
  • PrPtGe
  • Soft x-ray photoemission spectroscopy
  • Superconductor

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Nakamura, Y., Okazaki, H., Yoshida, R., Wakita, T., Hirai, M., Muraoka, Y., Takeya, H., Hirata, K., Kumigashira, H., Oshima, M., & Yokoya, T. (2010). Electronic structure of the novel filled skutterudite PrPt 4Ge12 superconductor. journal of the physical society of japan, 79(12), [124701]. https://doi.org/10.1143/JPSJ.79.124701