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Report No.

Electronic structures of strongly correlated uranium compounds studied by three-dimensional ARPES

Fujimori, Shinichi   

We have revealed the three-dimensional (3D) electronic structure of uranium compounds by 3D ARPES which is a newly-developed experimental technique. In 3D ARPES experiment, all three parameters in ARPES experiments (two detecting angles of photoelectrons and incident photon energy) are entirely scanned, and complete volume data set which cover the entire Brillouin zone is obtained. We have applied the 3D ARPES to the heavy Fermion superconductors URu$$_2$$Si$$_2$$. We found that the intensity at the Fermi level is significantly enhanced at a small region in the Brillouin zone and this enhancement is the contribution from narrow U 5f bands near the Fermi level. In the vicinity of this enhanced intensity, the U 5f bands are strongly hybridized with Ru 4d bands. Furthermore, the overall 3D electronic structure was mostly explained by the band-structure calculation treating all U 5f electrons as being itinerant.



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