Doping asymmetry and striping in a three-orbital CuO2 Hubbard model

While both the hole and electron doped cuprates can exhibit d(x2-y2)-wave superconductivity, the local distribution of the doped carriers is known to be significantly different with the doped holes going primarily on the O sites while the doped electrons go on the Cu sites. Here we report the results of density-matrix-renormalization-group calculations for a three-orbital model of a CuO2 lattice. In addition to the asymmetric dependence of the intra-unit-cell occupation of the Cu and O for hole and electron doping, we find important differences in the longer range spin and charge correlations. As expected, the pair-field response has a d(x2-y2)-like structure for both the hole and electron doped systems.