Lawrence J. Dunne and Erkki J. Brändas Superconductivity from repulsive electronic correlations on alternant cuprate and iron-based lattices International Journal of Quantum Chemistry 113
High-temperature superconductivity can be induced by repulsive electronic correlations. Time-reversed electron pairs on cuprate and iron-based pnictide and chalcogenide alternant lattices can interact with a short-range Coulomb repulsion and a weaker longer range attractive tail. Such interacting electrons can collectively correlate to produce superconductivity. The alternant lattice structure is the key stabilizing feature of such a mechanism giving high-temperature superconductivity with and s± condensate symmetries.
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