Phase diagrams of the three-band d-p model

The 2D Hubbard model is the simplest model that possibly explains the occurrence of high Tc superconductivity in cuprates. In particular, the three-band Hubbard model with d and p orbitals in the CuO2 plane probably captures the physics of high-temperature superconductivity. The phase diagrams for the three-band Hubbard model are presented using the weak coupling perturbation theory and the variational Monte Carlo method.