Phase-Slip Statistics of a Single Isolated Flux-Biased Superconducting Ring

We describe measurements of the thermally activated transitions between fluxoid states of a single isolated superconducting ring. We compare these measurements with theoretical predictions in which all of the relevant parameters are determined via independent characterization of the same ring. This...

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Bibliographic Details
Published in:Physical review letters 2020-08, Vol.125 (6), p.1, Article 067002
Main Authors: Petkovic, I., Lollo, A., Harris, J. G. E.
Format: Article
Language:English
Subjects:
Damping
Order parameters
Qualitative analysis
Superconductivity
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Summary:We describe measurements of the thermally activated transitions between fluxoid states of a single isolated superconducting ring. We compare these measurements with theoretical predictions in which all of the relevant parameters are determined via independent characterization of the same ring. This no-free-parameters comparison shows qualitative agreement over a wide range of temperatures. We discuss possible origins for the remaining discrepancies between the data and theory, in particular the choice of model for the superconducting order parameter's damping.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.125.067002