Superconductivity in electron-doped cuprates: Gap shape change and symmetry crossover with doping
Francisco Guinea, Robert S. Markiewicz, María A. H. Vozmediano
DOI 10.1103/PhysRevB.69.054509 · Physical Review B
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Abstract
The Kohn-Luttinger mechanism for superconductivity is investigated in a model for the electron-doped cuprates. The symmetry of the order parameter of the superconducting phase is determined as a function of the geometry of the Fermi surface together with the structure of the electron-hole susceptibility. It is found to remain dx2−y2 wave within a large doping range. The shape of the gap anisotropy evolves with doping, with the maximum gap moving away from (π,0), in good agreement with recent experiments. As the shift of the maximum increases, a crossover to dxy symmetry is found.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nd2-xCexCuO4 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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