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Critical-current reduction in thin superconducting wires due to current crowding

TitleCritical-current reduction in thin superconducting wires due to current crowding
Publication TypeJournal Article
Year of Publication2012
AuthorsHortensius HL, Driessen EFC, Klapwijk TM, Berggren KK, Clem JR
Journal TitleApplied Physics Letters
Volume100
Pages182602
Date Published04
Type of ArticleArticle
ISBN Number0003-6951
Accession NumberWOS:000303598600039
Abstract

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 degrees 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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4711217]
URL<Go to ISI>://WOS:000303598600039
DOI10.1063/1.4711217
Alternate JournalAppl. Phys. Lett.