Josephson effects in a constricted Bi-Sr-Ca-Cu-O bulk superconductor
- 30 May 1988
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 21 (15) , L523-L527
- https://doi.org/10.1088/0022-3719/21/15/008
Abstract
The current-voltage characteristics for a Bi-Sr-Ca-Cu-O bulk specimen incorporating a manually carved constriction show both zero-voltage and finite-voltage pair currents, flux flow and quasi-particle tunnelling regimes. The finite voltage pair current regime may be understood to arise due to non-equilibrium enhancement of Josephson supercurrents. The pair current amplitude modulates with applied DC magnetic fields. Microwave-induced Shapiro steps are clearly seen in the I-V curves. The Josephson effects arise due to the presence of three-dimensional arrays of inter-grain junctions.Keywords
This publication has 3 references indexed in Scilit:
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- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987