Role of oxygen in the electron-doped superconducting cuprates
Abstract
We report on resistivity and Hall measurements in thin films of the electron-doped superconducting cuprate Pr2-xCexCuO4δ. Comparisons between x = 0.17 samples subjected to either ion-irradiation or oxygenation demonstrate that changing the oxygen content has two separable effects: 1) a doping effect similar to that of cerium, and 2) a disorder effect. These results are consistent with prior speculations that apical oxygen removal is necessary to achieve superconductivity in this compound.
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