The many-body nature of O 1s resonant X-ray emission spectroscopy (RXES) in edge-share-type quasi-one-dimensional cuprates with hole doping is discussed on the basis of finite-size cluster model calculations. In the case of hole-doped systems, the line shape of O 1s RXES strongly depends on the incident X-ray energy (ωin). This is just a manifestation of state-selectivity of RXES. When ωin is tuned at the upper Hubbard band, we observe inelastic scattering peaks due to the Zhang-Rice singlet (ZRS) and dd excitations besides the O 2p main band emission. On the other hand, when ωin is tuned at the ZRS band, the charge-transfer excitation edge region and the dd excitation peaks are significantly enhanced in accordance with the recent experiment for Ca2+xY2-xCu 5O10.
- Electron correlation
- Resonant X-ray emission spectroscopy
- X-ray absorption
ASJC Scopus subject areas
- Physics and Astronomy(all)