Pairing Symmetry and Flux Quantization in a Tricrystal Superconducting Ring of YBa2Cu3O7−δ
C. C. Tsuei, J. R. Kirtley, C. C. Chi, Lock See Yu-Jahnes, A. Gupta, T. Shaw, J. Z. Sun, M. B. Ketchen
DOI 10.1103/PhysRevLett.73.593 · Physical Review Letters
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Abstract
We have used the concept of flux quantization in superconducting YBa2Cu3O7−δ rings with 0, 2, and 3 grain-boundary Josephson junctions to test the pairing symmetry in high-Tc superconductors. The magnetic flux threading these rings at 4.2 K is measured by employing a scanning superconducting quantum interference device microscope. Spontaneous magnetization of a half magnetic flux quantum, Φ02=h4e has been observed in the 3-junction ring, but not in the 2-junction rings. These results are consistent with d-wave pairing symmetry.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90.7 | Pressure not reported | zero_resistance |
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