Current-Phase Relation of YBa2Cu3O7-X/Nb Unconventional Superconductor Junctions

Abstract:

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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.

Info:

Periodical:

Edited by:

A.G. Mamalis, M. Enokizono and A. Kladas

Pages:

38-41

DOI:

10.4028/www.scientific.net/MSF.670.38

Citation:

B. Chesca et al., "Current-Phase Relation of YBa2Cu3O7-X/Nb Unconventional Superconductor Junctions", Materials Science Forum, Vol. 670, pp. 38-41, 2011

Online since:

December 2010

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$35.00

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