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Anomalous Periodicity of the Current-Phase Relationship of Grain-Boundary Josephson Junctions in High-Tc Superconductors

E. Il'ichev·V. Zakosarenko·R. P. J. IJsselsteijn·H. E. Hoenig·V. Schultze·H. -G. Meyer·M. Grajcar·R. Hlubina
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Abstract

The current-phase relation (CPR) for asymmetric 45 degree Josephson junctions between two d-wave superconductors has been predicted to exhibit an anomalous periodicity. We have used the single-junction interferometer to investigate the CPR for this kind of junctions in YBCO thin films. Half-fluxon periodicity has been experimentally found, providing a novel source of evidence for the d-wave symmetry of the pairing state of the cuprates.

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E. Il'ichev, V. Zakosarenko, R. P. J. IJsselsteijn, H. E. Hoenig, V. Schultze, H. -G. Meyer, M. Grajcar, R. Hlubina. 1998-11-02. Anomalous Periodicity of the Current-Phase Relationship of Grain-Boundary Josephson Junctions in High-Tc Superconductors. https://doi.org/10.1103/physrevb.60.3096

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