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2008 | 113 | 1 | 407-412
Article title

Electronic States of UNi_2 from Photoemission Spectroscopy

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EN
Abstracts
EN
We measured the angle-resolved ultraviolet and X-ray photoemission spectra of UNi_2 single crystal. The valence band angle-resolved ultraviolet photoemission spectra were compared to the accessible band structure calculations. For UNi_2 the lowest binding energy strong emission at about -0.1 eV comes from U 5f states and overlaps with the Fermi edge. A small feature at -0.6 eV was ascribed also to U 5f electrons with more localised character. The higher-energy two-peak structure at about -1.2 eV and -2.1 eV comes from Ni 3d states. X-ray photoemission spectroscopy shows the standard two-line spin-orbit splitting of the Ni 2p states and of the U 4f states. Some hybridisation of the Ni 3d and U 5f state was observed in the spectra. The pronounced satellites to the Ni 2p and 3p states, associated with the on-site Coulomb repulsion and other electron correlation energies, were observed.
Keywords
EN
Contributors
author
  • Department of Solid State Physics, AGH University of Science and Technology, 30-059 Cracow, Poland
  • Department of Solid State Physics, AGH University of Science and Technology, 30-059 Cracow, Poland
author
  • Institute of Physics, Pedagogical University, 30-084 Cracow, Poland
author
  • Institute of Physics, Pedagogical University, 30-084 Cracow, Poland
author
  • Institute of Molecular Physics, PAS, 60-179 Poznań, Poland
author
  • Institute of Molecular Physics, PAS, 60-179 Poznań, Poland
author
  • Institute of Experimental Physics, SAS, 040 01 Košice, Slovakia
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n1100kz
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