Superconductivity in the three-band model of cuprates: nodal direction characteristics and influence of intersite interactions

Abstract

The three-band Emery model is applied to study the selected principal features of the $d$-$wave$ superconducting phase in the copper-based compounds. The electron-electron correlations are taken into account by the use of the diagrammatic expansion of the Guztwiller wave function (DE-GWF) method. The nodal Fermi velocity, Fermi momentum and effective mass are all determined in the paired state and show relatively good agreement with the available experimental data, as well as with the corresponding single-band calculations. Additionally, the influence of the next-nearest neighbor oxygen-oxygen hopping and intersite Coulomb repulsion terms on the superconducting phase is analyzed.

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• The Hubbard model: A computational perspective
• Superconducting stripes in the hole-doped three-band Hubbard model
• A unified theory of spin and charge excitations in high-$T_c$ cuprates: Quantitative comparison with experiment and interpretation
• Universal collective modes from strong electronic correlations: Modified $1/{\mathcal{N}}_f$ theory with application to high-$T_c$ cuprates
• Hubbard models with arbitrary structures in programmable optical lattices
• Oxygen hole content, charge-transfer gap, covalency, and cuprate superconductivity
• Multi-band D-TRILEX approach to materials with strong electronic correlations
• Screened superexchange mechanism for superconductivity applied to cuprates