Coherent organization of electronic correlations as a mechanism to enhance and stabilize high-T_C cuprate superconductivity

Utilizing a new development in the analysis of angle-resolved photoemission data of Pb-doped Bi₂Sr₂CaCu₂O₈ crystals, we show that the strange metal normal-state correlations don’t simply disappear in the superconducting state, but are instead converted into a strongly renormalized coherent state, with stronger normal state correlations leading to stronger superconducting state renormalization. Further, we show that this conversion begins well above T_C at the onset of superconducting fluctuations and that it greatly increases the number of states that can pair. Therefore, there is positive feedback––the superconductive pairing creates the conversion that in turn strengthens the pairing. While such positive feedback should enhance a conventional pairing mechanism, it could potentially also sustain a fully electronic pairing mechanism.