Superconducting current-phase relation in Nb/Au/(001)YBa2Cu3Ox heterojunctions

2000/08/04 by P. V. Komissinski, Komissinski, P. V., E. Il'ichev +15
Physics and Astronomy · #FOS: Physical sciences #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.cond-mat/0008077

4 pages, 5 figures

arxiv created 2000/08/07 · arxiv updated 2009/11/30

Abstract

We probe directly the superconducting current-phase relations (CPR) of Nb/Au/(001) YBa2Cu3Ox heterojunctions prepared in epitaxial c-axis oriented YBa2Cu3Ox (YBCO) thin films. The measurements are performed by a single-junction interference experiment. Atomic Force Microscope observations and estimations made from I-V characteristics confirm the c-axis current transport. No deviation of the current-phase relation from a sinusoidal shape has been found within the experimental accuracy. Possible reasons of the absence of the second harmonic in the CPR due to a second order tunneling are discussed.

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