Theory of the coupling of quantum-critical fluctuations to fermions and d-wave superconductivity in cuprates
Vivek Aji, Arkady Shekhter, C. M. Varma
DOI 10.1103/PhysRevB.81.064515 · Physical Review B
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Abstract
The quantum-critical fluctuations of the time-reversal breaking order parameter which is observed in the pseudogap regime of the cuprates are shown to couple to the lattice equivalent of the local angular momentum of the fermions. Such a coupling favors scattering of fermions through angles close to ±π/2 which is unambiguously shown to promote d-wave pairing. The right order of magnitude of Tc and the zero temperature gap Δ/Tc are calculated using the same fluctuations which give the anomalous normal state properties for dopings near the quantum-critical value.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2CuO4 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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