Angular dependence of the Josephson critical current across c-axis twist junctions of layered superconductors

Richard A. Klemm; Carsten T. Rieck; Kurt Scharnberg

doi:10.1117/12.332455

9 December 1998 Angular dependence of the Josephson critical current across c-axis twist junctions of layered superconductors

Richard A. Klemm, Carsten T. Rieck, Kurt Scharnberg

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Proceedings Volume 3480, Superconducting Superlattices II: Native and Artificial; (1998) https://doi.org/10.1117/12.332455
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

We studied theoretically the c-axis Josephson critical current for bicrystals of high temperature superconductors twisted an angle (phi) 0 about the c-axis with respect to eachother. We used the effective Lawrence-Doniach models appropriate for the cases or pure s-wave or dx2-y2-wave order parameters, and of a dominant dx2-y2-wave order parameter combined with a subdominant one of either s-wave or d_xy-wave form, as a function of the temperature and (phi) 0. Our results demonstrate that this new phase- sensitive experiment can serve as a very useful test of order parameter symmetry. In particular, the recent zero- field experiments in the vicinity of Tc by Li et al. on c- axis twist junctions of Bi₂Sr₂CaCu₂O_8+(delta ) are very difficult to explain with a dominant dx2-y2-wave order parameter.

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Richard A. Klemm, Carsten T. Rieck, and Kurt Scharnberg "Angular dependence of the Josephson critical current across c-axis twist junctions of layered superconductors", Proc. SPIE 3480, Superconducting Superlattices II: Native and Artificial, (9 December 1998); https://doi.org/10.1117/12.332455

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