Correlation Effect in Resonant Photoemission Spectra of UPd2Al3 and UC

Abstract

Both U5 f partial density of states (DOS) and partial DOS without U5 f for UPd 2 Al 3 and UC were experimentally obtained by using U5 d −5 f resonant photoemission technique. Both spectra are compared with the results obtained by the energy band calculation. From the comparison, the spectra of U5 f partial DOS cannot be reproduced by the band calculation except for the Fermi edge structures. In contrast, the spectra of partial DOS without U5 f states are reproduced well by those from ligands. These facts suggest that the spectra are not explained only by the band theory, but the correlation effect.