Critical-Current Reduction in Thin Superconducting Wires Due to Current Crowding

Details Critical-Current Reduction in Thin Superconducting Wires Due to Current Crowding Critical-Current Reduction in Thin Superconducting Wires Due to Current Crowding

2012-03-19

arxiv.org/abs/1203.4253v2

Physics

Condensed Matter

Superconductivity

Scientific paper

We demonstrate experimentally that the critical current in superconducting NbTiN wires is dependent on their geometrical shape, due to current-crowding effects. Geometric patterns such as 90 degree corners and sudden expansions of wire width are shown to result in the reduction of critical currents. The results are relevant for single-photon detectors as well as parametric amplifiers.

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