Resonant Photoemission and X-Ray Photoemission Spectra of UPd₂Al₃, UPt₂Si₂ and U₂PtSi₃

抄録

The valence-conduction band structures of UPd₂Al₃, UPt₂Si₂ and U₂PtSi₃ have been studied by means of photoemission spectroscopy with synchrotron radiation. The spectral distributions of the partial densities of states with various symmetries in the valence-conduction states are obtained by means of resonant photoemission. The 5f partial energy-distribution-curves have sharp Fermi edges. Single peaks of the 5f partial spectra are located at the Fermi edges and the spectra have long tails ascribable to superimposed indistinguishable hump features. It is suggested that they are caused by the existence of satellites. The U4f spectra are also measured. They exhibit well-defined satellite features. The distinctive line shapes of the main lines and the satellites are analyzed using the Kotani-Toyozawamodel, on which the interpretation of the 5f partial spectra is based implicitly.