Fabrication of TlCaBaCuO step-edge Josephson junctions with hysteretic behavior
- 24 February 1992
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 60 (8) , 1013-1015
- https://doi.org/10.1063/1.106506
Abstract
One way to create hysteretic Josephson junctions from the currently available nonhysteretic high temperature superconducting junctions is to artificially add capacitance. We have adapted a multilayer technique for artificial capacitance addition/grain boundary modification to produce TlCaBaCuO step‐edge junctions exhibiting large amounts of hysteresis at 77 K. A gaplike structure is present at 32–36 mV that has a temperature dependence that does not contradict that predicted by the Bardeen‐Cooper‐Schrieffer theory. In addition, the junctions show fast switching times, less than a fixture limited 20 ps, and Fraunhofer‐like dependence of critical current on magnetic field.Keywords
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