A comparison between the Fehrenbacher-Rice and the Liechtenstein-Mazin models

Abstract Unoccupied electronic states of Y 1−x Pr x Ba 2 Cu 3 O 7−x (x = 0 − 1) thin films have been investigated using high-resolution polarization-dependent O K-edge x-ray absorption spectroscopy (XANES). After determining the hole distribution among different oxygen sites of the Pr-doped thin films, we compare the experimental data with the Fehrenbacher and Rice (FR) model and the Liechtenstein and Mazin (LM) model, both of which are based on the hybridization of Pr 4 f z ( x 2 − y 2 and O 2 p π orbitals in PrBa 2 Cu 3 O 7−y . Our experimental results are more consistent with the FR model.