X-ray photoemission lineshapes and energies in PdxCu1-x

Abstract

Measurements of core and valence level X-ray photoemission spectra are reported for a series of ten Pd_xCu_1-x alloys with varying compositions. The core level binding energy shifts display a distinct dichotomy in behaviour at x approximately=0.4. For x0.4, the Pd shifts are consistent with a Fermi level different from that of pure Pd. The systematics of the Pd core level lineshapes are shown to be in accordance with this interpretation.