1. Electronic State of T′-Pr1.3−xLa0.7CexCuO4 (x = 0.10) Studied by Compton Scattering
- Author
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Kawamata, Takayuki, Saito, Shin, Tsuji, Naruki, Sumura, Takuya, Adachi, Tadashi, Kato, Masatsune, Sakurai, Yoshiharu, and Koike, Yoji
- Subjects
Superconductivity (cond-mat.supr-con) ,Condensed Matter - Superconductivity ,FOS: Physical sciences ,General Physics and Astronomy - Abstract
We have performed Compton scattering measurements on as-grown and reduced single 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. The obtained results have revealed that the numbers of electrons in the O2p orbital in the Zhang-Rice singlet band, the Cu3dx2-y2 orbital, and the Cu3d3z2-r2 orbital are increased by reduction annealing. The increase in the number of Cu3d3z2-r2 electrons suggests the existence of Cu3d3z2-r2 holes in the as-grown single crystal. This is spectroscopic evidence of local hole doping into the Cu3d3z2-r2 orbital around the excess oxygen, as suggested by transport measurements [T. Adachi et al., J. Phys. Soc. Jpn. 82, 063713 (2013)]., 12 pages, 2 figures
- Published
- 2022