d-Wave-Induced Josephson current counterflow in YBa2Cu3O7/Nb Zigzag Junctions


Smilde, H.J.H. and Ariando and Blank, D.H.A. and Gerritsma, G.J. and Hilgenkamp, H. and Rogalla, H. (2002) d-Wave-Induced Josephson current counterflow in YBa2Cu3O7/Nb Zigzag Junctions. Physical Review Letters, 88 (5). 057004-1. ISSN 0031-9007

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Abstract:Well-defined zigzag-shaped ramp-type Josephson junctions between YBa2Cu3O7 and Nb have been studied. The magnetic field dependencies of the critical currents provide evidence for d-wave¿induced alternations in the direction of the Josephson current between neighboring sides of the zigzag structure. The arrays present controllable model systems to study the influences of ¿ facets in high-angle high- Tc grain boundaries. From the characteristics, we estimate a possible imaginary s-wave admixture to the order parameter of the YBa2Cu3O7 to be below 1%.
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Copyright:© 2002 American Physical Society
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Link to this item:http://purl.utwente.nl/publications/43427
Official URL:https://doi.org/10.1103/PhysRevLett.88.057004
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