Experimentally observable signatures of odd-frequency pairing in multiband superconductors
2015 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 92, no 9, 094517Article in journal (Refereed) Published
We investigate how hybridization (single-quasiparticle scattering) between two superconducting bands induces odd-frequency superconductivity in a multiband superconductor. An explicit derivation of the odd-frequency pairing correlation and its full frequency dependence is given. We also find that the density of states is modified, at higher energies, from the sum of the two BCS spectra to also include additional hybridization gaps with strong coherence peaks when odd-frequency pairing is present. These gaps constitute clear experimentally measurable signatures of odd-frequency pairing in multiband superconductors.
Place, publisher, year, edition, pages
2015. Vol. 92, no 9, 094517
IdentifiersURN: urn:nbn:se:kth:diva-175919DOI: 10.1103/PhysRevB.92.094517ISI: 000362081300002ScopusID: 2-s2.0-84943736943OAI: oai:DiVA.org:kth-175919DiVA: diva2:867015
FunderWenner-Gren FoundationsSwedish Research CouncilSwedish Foundation for Strategic Research EU, European Research Council, DM-321031
QC 201511042015-11-042015-10-262015-11-04Bibliographically approved