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A new approach to the theory of high-temperature superconductivity is proposed, based on the two-dimensional antiferromagnetic spin correlations observed in these materials over distances large compared to the lattice spacing. The spin ordering produces an electronic pseudogap ₒ₃ₖ which is locally suppressed by the addition of a hole. This suppression forms a bag inside which the hole is self-consistently trapped. Two holes are attracted by sharing a common bag. The resulting pairing interaction V₊-₊' leads to a superconducting energy gap ₒ₂ which is nodeless over the Fermi surface, where ₒ₂ₒ₃ₖ₄ₗ (-ₓ/{U}), with of order unity.
Schrieffer et al. (Mon,) studied this question.