We have performed ultrahigh-resolution angle-resolved photoemission spectroscopy on ${\mathrm{UPd}}_3$ to study the band structure near the Fermi level ${(E}_F)$ and the Fermi surface. We found three Fermi surfaces (FS’s): two hole pockets with a dominant Pd $4d$ character at the $\mathit{\Gamma }$ (A) point and an electron pocket with a U $6d$ nature at the K (H) point. These FS’s are qualitatively well reproduced in the band structure calculation based on the localized U-$5f$-electron model, while remarkable quantitative discrepancies are observed near $E_F.$ The U $5f$ states are located 0.4–1.0 eV below $E_F$ and do not contribute to the Fermi surface. These results indicate the strongly localized nature of U $5f$ electrons in ${\mathrm{UPd}}_3.$

• Received 18 June 2001

DOI:https://doi.org/10.1103/PhysRevB.66.245110