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Anomalous Nernst effect and heat transport by vortex vacancies in granular superconductors
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics.
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics.ORCID iD: 0000-0002-9881-7857
2010 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 81, no 6, 060508-1-060508-4 p.Article in journal (Refereed) Published
Abstract [en]

We study the Nernst effect due to vortex motion in two-dimensional granular superconductors using simulations with Langevin or resistively shunted Josephson-junction dynamics. In particular, we show that the geometric frustration of both regular and irregular granular materials can lead to thermally driven transport of vortices from colder to hotter regions, resulting in a sign reversal of the Nernst signal. We discuss the underlying mechanisms of this anomalous behavior in terms of heat transport by mobile vacancies in an otherwise pinned vortex lattice.

Place, publisher, year, edition, pages
2010. Vol. 81, no 6, 060508-1-060508-4 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-19261DOI: 10.1103/PhysRevB.81.060508ISI: 000274998100026Scopus ID: 2-s2.0-77954832190OAI: oai:DiVA.org:kth-19261DiVA: diva2:337308
Funder
Swedish Research Council
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Phase fluctuation phenomena in superconductors
Open this publication in new window or tab >>Phase fluctuation phenomena in superconductors
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. ix, 65 p.
Series
Trita-FYS, ISSN 0280-316X ; 2012:28
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-95464 (URN)978-91-7501-380-0 (ISBN)
Public defence
2012-06-14, FB42, Albanova University Center, Roslagstullsbacken 21, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20120530Available from: 2012-05-30 Created: 2012-05-25 Last updated: 2012-05-30Bibliographically approved

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