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Odd frequency superconducting pairing in topological insulators
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
2012 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 86, no 14, 144506- p.Article in journal (Refereed) Published
Abstract [en]

We discuss the appearance of odd-frequency spin-triplet s-wave superconductivity, first proposed by Berezinskii [J. Exp. Theor. Phys. 20, 287 (1974)], on the surface of a topological insulator proximity coupled to a conventional spin- singlet s-wave superconductor. Using both analytical and numerical methods, we show that this disorder robust odd-frequency state is present whenever there is an in-surface gradient in the proximity induced gap, including superconductor-normal state junctions. The time-independent order parameter for the odd-frequency superconductor is proportional to the in-surface gap gradient. The induced odd-frequency component does not produce any low-energy states.

Place, publisher, year, edition, pages
2012. Vol. 86, no 14, 144506- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-82439DOI: 10.1103/PhysRevB.86.144506ISI: 000309578000005OAI: oai:DiVA.org:su-82439DiVA: diva2:567767
Note

AuthorCount:2;

Available from: 2012-11-14 Created: 2012-11-14 Last updated: 2017-12-07Bibliographically approved

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