Unconventional thermoelectric effect in superconductors that break time-reversal symmetry
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
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
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-177934DOI: 10.1103/PhysRevB.92.174510ISI: 000364403200002ScopusID: 2-s2.0-84948430133OAI: oai:DiVA.org:kth-177934DiVA: diva2:876368
QC 201512032015-12-032015-11-302015-12-03Bibliographically approved