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We have performed Compton scattering measurements on as-grown and reducedsingle crystals of the electron-doped T'-cuprate Pr1.3-xLa0.7CexCuO4 (x = 0.10)to investigate the effect of reduction annealing on the electronic state. Theobtained results have revealed that the numbers of electrons in the O2p orbitalin the Zhang-Rice singlet band, the Cu3dx2-y2 orbital, and the Cu3d3z2-r2orbital are increased by reduction annealing. The increase in the number ofCu3d3z2-r2 electrons suggests the existence of Cu3d3z2-r2 holes in the as-grownsingle crystal. This is spectroscopic evidence of local hole doping into theCu3d3z2-r2 orbital around the excess oxygen, as suggested by transportmeasurements [T. Adachi et al., J. Phys. Soc. Jpn. 82, 063713 (2013)].

Electronic State of T'-Pr$_{1.3-x}$La$_{0.7}$Ce$_x$CuO$_4$ ($x = 0.10$) Studied by Compton Scattering