Spin-bag mechanism of high-temperature superconductivity
J. R. Schrieffer, X.-G. Wen, S.-C. Zhang
DOI 10.1103/PhysRevLett.60.944 · Physical Review Letters
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Abstract
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 ΔSDW 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 Vk−k’ leads to a superconducting energy gap ΔSC which is nodeless over the Fermi surface, where ΔSC≃ΔSDWexp(−t/αU), with α of order unity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-x(Sr,Ba)xCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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