Effective Hamiltonian for cuprate superconductors derived from multi-scale ab initio scheme with level renormalization

Abstract

Three-types (three-band, two-band and one-band) of effective Hamiltonians for the HgBa${}_2$CuO${}_4$ and three-band effective Hamiltonian for La${}_2$CuO${}_4$ are derived beyond the level of the constrained-GW approximation combined with the self-interaction correction (cGW-SIC) derived in Hirayama et al. Phys. Rev. B 98, 134501 (2018) by improving the treatment of the interband Hartree energy. The charge gap and antiferromagnetic ordered moment show good agreement with the experimental results when the present effective Hamiltonian is solved, indicating the importance of the present refinement. The obtained Hamiltonians will serve to clarify the electronic structures of these copper oxide superconductors and to elucidate the superconducting mechanism.

23 pages, 21 figures and supplementary material(22 pages). arXiv admin note: text overlap with arXiv:1708.07498

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• Unified description of cuprate superconductors using four-band $d$-$p$ model
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• Superconductivity in bilayer $t$-$t^{\prime }$ Hubbard models