Nonmonotonic dx2−y2 Superconducting Order Parameter in Nd2−xCexCuO4
G. Blumberg, A. Koitzsch, A. Gozar, B. S. Dennis, C. A. Kendziora, P. Fournier, R. L. Greene
DOI 10.1103/PhysRevLett.88.107002 · Physical Review Letters
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Abstract
Low energy polarized electronic Raman scattering of the electron-doped superconductor Nd2−xCexCuO4 ( x=0.15, Tc=22K) has revealed a nonmonotonic dx2−y2 superconducting order parameter. It has a maximum gap of 4.4kBTc at Fermi surface intersections with an antiferromagnetic Brillouin zone (the “hot spots”) and a smaller gap of 3.3kBTc at fermionic Brillouin zone boundaries. The gap enhancement in the vicinity of the hot spots emphasizes the role of antiferromagnetic fluctuations and the similarity in the origin of superconductivity for electron- and hole-doped cuprates.
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. | 22 | Pressure not reported | onset |
| Nd2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22 | Pressure not reported | onset |
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