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Unconventional thermoelectric effect in superconductors that break time-reversal symmetry
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics. (Center for Quantum Materials)
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Condensed Matter Theory. (Center for Quantum Materials)ORCID iD: 0000-0001-5087-3115
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics. (Center for Quantum Materials)
2015 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 92, no 17, 174510Article in journal (Refereed) Published
Abstract [en]

We demonstrate that superconductors that break time-reversal symmetry can exhibit thermoelectric properties, which are entirely different from the Ginzburg mechanism. As an example, we show that in the s + is superconducting state there is a reversible contribution to thermally induced supercurrent, whose direction is not invariant under time-reversal operation. Moreover in contrast to Ginzburg mechanism it has a singular behavior near the time-reversal symmetry breaking phase transition. The effect can be used to confirm or rule out the s + is state, which is widely expected to be realized in pnictide compounds Ba1-xKxFe2As2 and stoichiometric LiFeAs.

Place, publisher, year, edition, pages
American Physical Society , 2015. Vol. 92, no 17, 174510
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-177934DOI: 10.1103/PhysRevB.92.174510ISI: 000364403200002Scopus ID: 2-s2.0-84948430133OAI: oai:DiVA.org:kth-177934DiVA: diva2:876368
Note

QC 20151203

Available from: 2015-12-03 Created: 2015-11-30 Last updated: 2017-12-01Bibliographically approved

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Garaud, Julien

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