Quantum Monte Carlo simulations and experimental photoemission data reveal that superconductivity arises in the pseudogap regime from an increase in the strength of the spin-fluctuation pairing interaction as temperature is lowered.
Significance and Impact
This result demonstrates a new paradigm for pairing when the usual Cooper instability of the Fermi sea is suppressed by the pseudogap.
Research Details
-Simulations and analysis of the temperature dependence of the pairing interaction and the propagation amplitude of a Cooper pair.
-Showed that Cooper instability is suppressed by the pseudogap and that pairing arises from increasing strength of spin-fluctuation pairing interaction as temperature decreases.
-Demonstrated experimental consistency with theoretical prediction through analysis of photoemission data.
T.A. Maier, et al. Nat. Comm. (2016). DOI: 10.1038/ncomms11875
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