Chiral plaquette polaron theory of cuprate superconductivity

@article{TahirKheli2007ChiralPP,
  title={Chiral plaquette polaron theory of cuprate superconductivity},
  author={Jamil Tahir-Kheli and William A. Goddard},
  journal={Physical Review B},
  year={2007},
  volume={76},
  pages={014514}
}
Ab initio density functional calculations on explicitly doped La2−xSrxCuO4 find that doping creates localized holes in out-of-plane orbitals. A model for cuprate superconductivity is developed based on the assumption that doping leads to the formation of holes on a four-site Cu plaquette composed of the out-of-plane A1 orbitals apical O pz, planar Cu d3z2−r2, and planar O psigma. This is in contrast to the assumption of hole doping into planar Cu dx^2−y^2 and O psigma orbitals as in the t-J… 

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