X-ray absorption near-edge spectra of overdoped La_2-xSr_xCuO_4 high-T_c superconductors

Details X-ray absorption near-edge spectra of overdoped La_2-xSr_xCuO_4 high-T_c superconductors X-ray absorption near-edge spectra of overdoped La_2-xSr_xCuO_4 high-T_c superconductors

2011-01-28

arxiv.org/abs/1101.5451v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

We present results for realistic modeling of the x-ray absorption near edge structure (XANES) of the overdoped high-T_c superconductor La_2-xSr_xCuO_4 in the hole doping range x = 0.20-0.30. Our computations are based on a real-space Green's function approach in which strong-correlation effects are taken into account in terms of a doping-dependent self-energy. The predicted O K-edge XANES is found to be in good accord with the corresponding experimental results in this overdoped regime. We find that the low energy spectra are dominated by the contribution of O-atoms in the cuprate planes, with little contribution from apical O-atoms.

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