High-Resolution Photoemission Study of UNi2Al3 and URu2Si2

See Hun Yang, Hiroshi Kumigashira, Takayoshi Yokoya, Ashishi Chainani, Takashi Takahashi, Se Jung Oh, Noriaki Sato, Takemi Komatsubara

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High-resolution low-temperature photoemission spectroscopy has been 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) are found to have a dominant U 5f character while the prominent peak around 2 eV is due to the Ni 3d or Ru 4d states. 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)2685-2689
Number of pages5
Journaljournal of the physical society of japan
Issue number8
Publication statusPublished - Jan 1 1996
Externally publishedYes


  • 5f electrons
  • Electronic structure
  • High-resolution photoemission spectroscopy
  • Uranium compounds

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Yang, S. H., Kumigashira, H., Yokoya, T., Chainani, A., Takahashi, T., Oh, S. J., Sato, N., & Komatsubara, T. (1996). High-Resolution Photoemission Study of UNi2Al3 and URu2Si2. journal of the physical society of japan, 65(8), 2685-2689. https://doi.org/10.1143/JPSJ.65.2685