Many Body Effect in Inner Shell Photoemission and Photoabsorption Spectra of La Compounds

Abstract

Theoretical analysis is made for spectra of the 3d core photoemission (3d-XPS) and 2p core photoabsorption (L₃-XAS) in insulating La compounds La₂O₃, LaF₃ and LaCl₃ by using the single-site Anderson model. In order to give a consistent interpretation for 3d-XPS and L₃-XAS, it is essentially important to take into account, in the final state of L₃-XAS, the Coulomb interaction U_fd (between 4f and 5d electrons) and −U_dc (between a 5d electron and a core hole) in addition to −U_fc (between a 4f electron and a core hole). A similar analysis is also presented for the intermetallic cornpound LaPd₃.