Doping Asymmetry of a 3-orbital CuO${}_2$ Hubbard Model

Abstract

While both the hole and electron doped cuprates can exhibit $d_{x^2-y^2}$-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 calculations for a three-orbital model of a CuO${}_2$ 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 $d_{x^2-y^2}$-like structure for both the hole and electron doped systems.

16 pages, 7 figures

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• Testing for pair-density-wave order in La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$
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• First principle prediction of structural distortions in the cuprates and their impact on the electronic structure
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• Phase separation and pairing fluctuations in oxide materials
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