Electronic properties of Nd2−xCexCuO4+δ: A hard X-ray photoemission investigation

Cu 2p core levels spectra measured by X-ray photoemission spectroscopy of selected as-grown Nd2−xCexCuO4+δ samples are presented and discussed. The presence of a satellite peak in the 2p core level of Nd2−xCexCuO4+δ single crystal by hard X-ray photoemission is confirmed in all non-superconducting samples, films and single crystals investigated in this work. The comparison of the spectral features of the different samples suggests that the presence and the intensity of this satellite peak is not related to the electric transport properties, but to the texture characteristics.