Current-Phase Relation of YBa2Cu3O7-X/Nb Unconventional Superconductor Junctions
| Periodical | Materials Science Forum (Volume 670) |
|---|---|
| Main Theme | Applied Electromagnetic Engineering |
| Edited by | A.G. Mamalis, M. Enokizono and A. Kladas |
| Pages | 38-41 |
| DOI | 10.4028/www.scientific.net/MSF.670.38 |
| Citation | Boris Chesca et al., 2010, Materials Science Forum, 670, 38 |
| Online since | December, 2010 |
| Authors | Boris Chesca, Henk Jan Smilde, Hans Hilgenkamp |
| Keywords | Low Temperature Electric, Thin Film Superconducting Cuprate Junction, Transport Measurement, Unconventional Superconductivity |
| Price | US$ 28,- |
The knowledge of the current-phase relation (CPR) in superconducting junctions is essential in many applications like low-dissipative superconducting electronics or superconducting qubits for quantum computation. Theory predicts that unconventional superconductivity induces a significant second harmonic J2 in the CPR. Consequently, anomalies such as half-integer Shapiro steps should be observed in the microwave assisted current-voltage characteristics of the junctions. We performed electric transport measurements in YBa2Cu3O7-x/Nb unconventional superconductor junctions for 72 different tunneling directions in the ab plane and found no trace of such anomalies. This suggest that J2 is insignificantly small so that YBa2Cu3O7-x/Nb junctions have a purely sinusoidal CPR.