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Domain walls and their experimental signatures in s + i s superconductors
KTH, School of Engineering Sciences (SCI), Theoretical Physics.ORCID iD: 0000-0001-5087-3115
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics.
2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 112, no 1, 017003- p.Article in journal (Refereed) Published
Abstract [en]

Arguments were recently advanced that hole-doped Ba1-xKxFe2As2 exhibits the s+is state at certain doping. Spontaneous breaking of time-reversal symmetry in the s+is state dictates that it possess domain wall excitations. Here, we discuss what are the experimentally detectable signatures of domain walls in the s+is state. We find that in this state the domain walls can have a dipolelike magnetic signature (in contrast to the uniform magnetic signature of domain walls p+ip superconductors). We propose experiments where quench-induced domain walls can be stabilized by geometric barriers and observed via their magnetic signature or their influence on the magnetization process, thereby providing an experimental tool to confirm the s+is state.

Place, publisher, year, edition, pages
2014. Vol. 112, no 1, 017003- p.
Keyword [en]
Magnetic signatures, Time reversal symmetries, Wall excitation
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Other Physics Topics
Identifiers
URN: urn:nbn:se:kth:diva-143056DOI: 10.1103/PhysRevLett.112.017003ISI: 000331938800009Scopus ID: 2-s2.0-84892383243OAI: oai:DiVA.org:kth-143056DiVA: diva2:705474
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

QC 20140317

Available from: 2014-03-17 Created: 2014-03-17 Last updated: 2017-12-05Bibliographically approved

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