Simple numerical procedure for the spectral function of 4f photoexcitations - art. no. 115106

A simple numerical procedure is proposed to calculate valence-band and core -level photoemission spectra of 4f systems. The procedure is based on the s ingle-impurity Anderson model with an infinite degeneracy of the f level an d represents a minimal version of the Gunnarsson-Schonhammer approach. It e xtends the method of Imer and Wuilloud by taking into account the realistic valence-band structure but keeping its numerical simplicity. As an example several spectra of Ce compounds are calculated and compared with experimen t.