Comparison of the superconducting pairing between the oxide superconductors Ba1−xKxBiO3 and YBa2Cu3O6.6 using phase-sensitive Josephson tunneling
D. A. Brawner, C. Manser, H. R. Ott
DOI 10.1103/PhysRevB.55.2788 · Physical Review B
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Abstract
We compare the Josephson tunneling of a suspected d-wave superconductor, YBa2Cu3O6.6, with that of another oxide superconductor Ba1−xKxBiO3. For comparison the critical current Ic vs applied field of a single-crystal Josephson junction injecting supercurrent in the [110] direction is measured for both superconductors. For the YBa2Cu3O6.6 single crystal ( Tc=60 K), the critical current is a minimum at zero applied field, while for Ba1−xKxBiO3, the critical current reveals a maximum at zero field. The results are consistent with a d-wave order parameter for YBa2Cu3O6.6, and conventional s-wave superconductivity for Ba1−xKxBiO3.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O6.6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 60 | Pressure not reported | unknown |
| Ba1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 23 | Pressure not reported | unknown |
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