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

H.J.H. Smilde, A. Ariando, David H.A. Blank, G.J. Gerritsma, Johannes W.M. Hilgenkamp, Horst Rogalla

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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%.
Original languageUndefined
Pages (from-to)057004-1-057004-4
Number of pages4
JournalPhysical review letters
Issue number5
Publication statusPublished - 2002


  • IR-43427
  • METIS-206579

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