Magnetic-Field Dependence of the Maximum Supercurrent of La2−xCexCuO4−y Interferometers: Evidence for a Predominant dx2−y2 Superconducting Order Parameter
B. Chesca, K. Ehrhardt, M. Mößle, R. Straub, D. Koelle, R. Kleiner, A. Tsukada
DOI 10.1103/PhysRevLett.90.057004 · Physical Review Letters
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Abstract
We performed a phase-sensitive test of the symmetry of the superconducting order parameter of the electron doped cuprate La2−xCexCuO4−y using a superconducting quantum interferometer with spatially distributed Josephson junctions. The studies were made on a thin film grown on a SrTiO3 tetracrystal substrate. The superconducting transition temperature was about 29 K which indicates that the sample is close to optimal doping. The magnetic field dependence of the critical current gives strong evidence for a predominant dx2−y2 order parameter symmetry of the sample measured. It also gives upper limits for the s-wave component in a mixed order parameter of the type s+idx2−y2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xCexCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29 | Pressure not reported | unknown |
| Nd2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Pr2-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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