Electronic structure of superconducting UBe13

G. Landgren, Y. Jugnet, J. F. Morar, A. J. Arko, Z. Fisk, J. L. Smith, H. R. Ott, B. Reihl
1984 Physical Review B (Condensed Matter)  
We have studied the actinide superconductor UBei3 with resonant photoemission using synchrotron radiation 30 «hv «120 eV. In agreement with the anomalously high y value of 1.1 J/mole K2, we find a high density of 5 f states at the Fermi level EJ;. Uranium 6d electrons are not present at EJ; as can be derived from the zero intensity at EF in the off-resonance spectrum. The close resemblance of this off-resonance curve to a photoemission spectrum of pure Be suggests that the hybridization of U Sf
more » ... electrons with Be s,p electrons is small. Indeed, the UBe&3 photoemission curves look like a superposition of U and Be curves. By using photoemission results from UO2 as a reference, we find that the valence-band emission contains about one Sf electron. The present results on UBe~3 are compared with those of CeCu2Si2, another member of the family of exotic superconductors.
doi:10.1103/physrevb.29.493 fatcat:lxoisnjx6faojb2uihuhvtz3bi