Phase Diagram of Nickelate Superconductors Calculated by Dynamical Vertex Approximation

  title={Phase Diagram of Nickelate Superconductors Calculated by Dynamical Vertex Approximation},
  author={Karsten Held and Liang Si and Paul Worm and Oleg Janson and Ryotaro Arita and Zhicheng Zhong and Jan M. Tomczak and Motoharu Kitatani},
  booktitle={Frontiers in Physics},
We review the electronic structure of nickelate superconductors with and without effects of electronic correlations. As a minimal model, we identify the one-band Hubbard model for the Ni 3 d x 2 − y 2 orbital plus a pocket around the A-momentum. The latter, however, merely acts as a decoupled electron reservoir. This reservoir makes a careful translation from nominal Sr-doping to the doping of the one-band Hubbard model mandatory. Our dynamical mean-field theory calculations, in part already… 

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