Abstract
Photoemission experiments were performed on H-charged YBa2Cu3O7−δ films at room temperature. Samples produced by laser ablation were charged with H from the gas phase prior to the x-ray photoelectron spectroscopy measurements. X-ray photoelectron spectra clearly show the influence of H charging on the oxidation states of Cu ions. A linear correlation between H concentration and the intensity of the Cu 2p satellite line related to the mean line was found.
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