Theory of oxygen K-edge x-ray absorption spectra of cuprates
Xin Wang, Luca de' Medici, and A. J. Millis
TL;DR
This paper uses dynamical mean-field theory on a three-band model to study oxygen K-edge x-ray absorption in cuprates, revealing limitations of the model at high doping levels.
Contribution
It demonstrates that the conventional three-band model cannot fully explain experimental spectra at high doping, indicating the need for more comprehensive theories.
Findings
Model fails to reproduce experimental results at high doping
Physics beyond the three-band model becomes relevant at high doping levels
Doping dependence of spectra analyzed using dynamical mean-field theory
Abstract
The dynamical mean-field theory of the three-band model of copper-oxide superconductors is used to calculate the doping dependence of the intensity of the oxygen K-edge x-ray absorption spectra of high- copper oxide superconductors. The model is found not to reproduce the results of a recent experiment, suggesting that at sufficiently high doping the physics beyond the conventional three-band model becomes important.
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