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Proximity-induced unconventional superconductivity in topological insulators
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2013 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 87, no 22, 220506- p.Article in journal (Refereed) Published
Abstract [en]

We study and classify the proximity-induced superconducting pairing in a topological insulator (TI)-superconductor (SC) hybrid structure for SCs with different symmetries. The Dirac surface state gives a coupling between spin-singlet and spin-triplet pairing amplitudes as well as pairing that is odd in frequency for p-wave SCs. We also find that all SCs induce pairing that is odd in both frequency and orbital (band) index, with oddness in frequency and orbital index being completely interchangeable. The different induced pairing amplitudes significantly modify the density of states in the TI surface layer.

Place, publisher, year, edition, pages
2013. Vol. 87, no 22, 220506- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-204800DOI: 10.1103/PhysRevB.87.220506ISI: 000320948700002OAI: oai:DiVA.org:uu-204800DiVA: diva2:641066
Available from: 2013-08-15 Created: 2013-08-12 Last updated: 2017-12-06Bibliographically approved

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Black-Schaffer, Annica M.

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