Geometry-induced reduction of the critical current in superconducting nanowires

Details Geometry-induced reduction of the critical current in superconducting nanowires Geometry-induced reduction of the critical current in superconducting nanowires

2012-04-03

arxiv.org/abs/1204.0616v1

Physics

Condensed Matter

Superconductivity

Scientific paper

Reduction of the critical current in narrow superconducting NbN lines with sharp and rounded bends with respect to the critical current in straight lines was studied at different temperatures. We compare our experimental results with the reduction expected in the framework of the London model and the Ginsburg-Landau model. We have experimentally found that the reduction is significantly less than either model predicts. We also show that in our NbN lines the bends mostly contribute to the reduction of the critical current at temperatures well below the superconducting transition temperature.

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