dc.contributor.author | Clem, John R. | |
dc.contributor.author | Berggren, Karl K. | |
dc.date.accessioned | 2012-03-22T15:36:18Z | |
dc.date.available | 2012-03-22T15:36:18Z | |
dc.date.issued | 2011-11 | |
dc.date.submitted | 2011-11 | |
dc.identifier.issn | 1098-0121 | |
dc.identifier.issn | 1550-235X | |
dc.identifier.uri | http://hdl.handle.net/1721.1/69832 | |
dc.description.abstract | In this paper, we calculate the critical currents in thin superconducting strips with sharp right-angle turns, 180∘ turnarounds, and more complicated geometries, where all the line widths are much smaller than the Pearl length Λ=2λ2/d. We define the critical current as the current that reduces the Gibbs-free-energy barrier to zero. We show that current crowding, which occurs whenever the current rounds a sharp turn, tends to reduce the critical current, but we also show that when the radius of curvature is less than the coherence length, this effect is partially compensated by a radius-of-curvature effect. We propose several patterns with rounded corners to avoid critical-current reduction due to current crowding. These results are relevant to superconducting nanowire single-photon detectors, where they suggest a means of improving the bias conditions and reducing dark counts. These results also have relevance to normal-metal nanocircuits, as these patterns can reduce the electrical resistance, electromigration, and hot spots caused by nonuniform heating. | en_US |
dc.language.iso | en_US | |
dc.publisher | American Physical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1103/PhysRevB.84.174510 | en_US |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
dc.source | APS | en_US |
dc.title | Geometry-dependent critical currents in superconducting nanocircuits | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Clem, John, and Karl Berggren. “Geometry-dependent Critical Currents in Superconducting Nanocircuits.” Physical Review B 84.17 (2011): [27 pages]. | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science | en_US |
dc.contributor.approver | Berggren, Karl K. | |
dc.contributor.mitauthor | Berggren, Karl K. | |
dc.relation.journal | Physical Review B | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Clem, John; Berggren, Karl | en |
dc.identifier.orcid | https://orcid.org/0000-0001-7453-9031 | |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |