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dc.contributor.authorMikheenko, P.
dc.contributor.authorJohansen, T. H.
dc.contributor.authorChaudhuri, Saumyadip
dc.contributor.authorMaasilta, Ilari
dc.contributor.authorGalperin, Y. M.
dc.date.accessioned2016-02-09T12:33:33Z
dc.date.available2016-02-09T12:33:33Z
dc.date.issued2015
dc.identifier.citationMikheenko, P., Johansen, T. H., Chaudhuri, S., Maasilta, I., & Galperin, Y. M. (2015). Ray optics behavior of flux avalanche propagation in superconducting films. <em>Physical Review B</em>, 91 (6), 060507. <a href="http://dx.doi.org/10.1103/PhysRevB.91.060507">doi:10.1103/PhysRevB.91.060507</a>
dc.identifier.otherTUTKAID_65535
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/48709
dc.description.abstractExperimental evidence of wave properties of dendritic flux avalanches in superconducting films is reported. Using magneto-optical imaging the propagation of dendrites across boundaries between a bare NbN film and areas coated by a Cu layer was visualized, and it was found that the propagation is refracted in full quantitative agreement with Snell’s law. For the studied film of 170 nm thickness and a 0.9 μm thick metal layer, the refractive index was close to n = 1.4. The origin of the refraction is believed to be caused by the dendrites propagating as an electromagnetic shock wave, similar to damped modes considered previously for normal metals. The analogy is justified by the large dissipation during the avalanches raising the local temperature significantly. Additional time-resolved measurements of voltage pulses generated by segments of the dendrites traversing an electrode confirm the consistency of the adopted physical picture.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review B
dc.subject.othersuperconducting films
dc.subject.otherdendrites
dc.subject.otherflux avalanches
dc.titleRay optics behavior of flux avalanche propagation in superconducting films
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201602081494
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.oppiaineFysiikka
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-02-08T07:15:17Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn1098-0121
dc.relation.volume91
dc.type.versionpublishedVersion
dc.rights.copyright© 2015 American Physical Society. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.relation.doi10.1103/PhysRevB.91.060507


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