Temperature-dependent valence-band photoemission study of UNiSn
SCIE
SCOPUS
- Title
- Temperature-dependent valence-band photoemission study of UNiSn
- Authors
- Kang, JS; Park, JG; McEwen, KA; Olson, CG; Kwon, SK; Min, BI
- Date Issued
- 2001-08-15
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- The electronic structure of UNiSn has been investigated using photoemission spectroscopy (PES). The U 5f partial spectral weight (PSW) exhibits a broad peak centered at approximate to0.3 eV below E-F. The Ni 3d PSW shows the main peak well below E-F and a very low density of states (DOS) at E-F. The h nu dependence of the valence-band spectrum reveals a dominant U 5f electron character for the states near the Fermi level E-F, with a small contribution from the U 6d, Ni 3d, and Sn sp states. Comparison of the measured PES spectra to the LSDA+ U band structure calculation indicates the importance of the on-site Coulomb interaction between U 5f electrons in UNiSn. The high-resolution photoemission spectrum of UNiSn is described well by a V-shaped metallic DOS near E-F, suggesting a finite but reduced DOS at E-F. A possible origin for the reduced DOS at E-F might be the hybridization of the U 5f states to the Ni 3d states that have a very low DOS at E-F. T-dependent high-resolution PES for UNiSn reveals a finite DOS at E-F even above T-N.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12067
- DOI
- 10.1103/PhysRevB.64.085101
- ISSN
- 0163-1829
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 64, no. 8, 2001-08-15
- Files in This Item:
-
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.