High-resolution photoemission study of UNi2Al3 and URu2Si2

S. H. Yang, H. Kumigashira, T. Yokoya, A. Chainani, N. Sato, T. Komatsubara, S. J. Oh, T. Takahashi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

High-resolution low-temperature photoemission spectroscopy was performed for UNi2Al3 and URu2Si2 to study the nature of 5f electrons in U-based heavy fermion materials. Photoemission spectra of both compounds have a sharp peak at EF and a large broad peak around 2 eV, while only UNi2Al3 exhibits an additional small broad feature at 0.6 eV. The two features in the vicinity of EF (the EF-peak and the small structure at 0.6 eV) were found to have a dominant U 5f character. Comparison with the band structure calculations and experimental results on UPd2Al3 suggests that the EF-peak is ascribed to itinerant U 5f electrons while the following broad feature at 0.6 eV represents localized f electrons.

Original languageEnglish
Pages (from-to)143-145
Number of pages3
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume78
Publication statusPublished - May 1996
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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