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Vortex motion and flux-flow resistivity in dirty multiband superconductors
KTH, School of Engineering Sciences (SCI), Physics, Statistical Physics.
2016 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 94, no 22, article id 224506Article in journal (Refereed) Published
Abstract [en]

The conductivity of vortex lattices in multiband superconductors with high concentration of impurities is calculated based on microscopic kinetic theory at temperatures significantly smaller than the critical one. Both the limits of high and low fields are considered, when the magnetic induction is close to or much smaller than the critical field strength IIc2, respectively. It is shown that in contrast to single-band superconductors, the resistive properties are not universal but depend on the pairing constants and ratios of diffusivities in different bands. The low-field magnetoresistance can strongly exceed the Bardeen-Stephen estimation in a quantitative agreement with experimental data for the two-band superconductor MgB2.

Place, publisher, year, edition, pages
American Physical Society , 2016. Vol. 94, no 22, article id 224506
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Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-199745DOI: 10.1103/PhysRevB.94.224506ISI: 000390249400007Scopus ID: 2-s2.0-85006317991OAI: oai:DiVA.org:kth-199745DiVA, id: diva2:1067793
Note

QC 20170123

Available from: 2017-01-23 Created: 2017-01-16 Last updated: 2017-11-29Bibliographically approved

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Silaev, Mihail

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