Phase-sensitive tunneling measurements in a bulk YBa2Cu3O7−δ dc SQUID
B. M. Hinaus, M. S. Rzchowski, N. Heinig, X. Y. Cai, D. L. Kaiser
DOI 10.1103/PhysRevB.54.6770 · Physical Review B
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Abstract
We use Josephson tunneling in a bulk YBa2Cu3O7−δ bicrystal SQUID to investigate methods of determining the order parameter symmetry from transport measurements. We discuss procedures designed to eliminate the effects of self-fields due to transport currents in the sample, and apply these methods to our experimental system. The bulk bicrystal SQUID is designed to give zero phase shift in the event of pure s- or d-wave symmetry, and hence is an ideal experimental test of our analysis procedures. We find a method exploiting the time-reversal invariance of the SQUID equations (independent of the gap time-reversal properties) to be most useful.
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. | 93.05 | Pressure not reported | onset |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.05 | Pressure not reported | onset |
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