Dynamical mean-field theory for perovskites.

  title={Dynamical mean-field theory for perovskites.},
  author={Lombardo and Schmalian and Avignon. and Bennemann},
  journal={Physical review. B, Condensed matter},
  volume={54 8},
Using the Hubbard Hamiltonian for transition-metal 3{ital d} and oxygen 2{ital p} states with perovskite geometry, we present a dynamical mean-field theory that becomes exact in the limit of large coordination numbers or equivalently large spatial dimensions {ital D}. The theory is based on a description of these systems for large {ital D} using a selective treatment of different hopping processes, which cannot be generated by a unique scaling of the hopping element. The model is solved using a… Expand
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