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Upper Critical Field as a Probe for Multiband Superconductivity in Bulk and Interfacial STO
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Los Alamos National Laboratory, USA.
Number of Authors: 2
2015 (English)In: Journal of Superconductivity and Novel Magnetism, ISSN 1557-1939, E-ISSN 1557-1947, Vol. 28, no 8, 2373-2384 p.Article in journal (Refereed) Published
Abstract [en]

We investigate the temperature dependence of the upper critical field H-c2 as a tool to probe the possible presence of multiband superconductivity at the interface between LaAlO3 and SrTiO3 (LAO/STO). The behaviour of H-c2 can clearly indicate two-band superconductivity through its nontrivial temperature dependence. For the disorder scattering dominated two-dimensional LAO/STO interface, we find a characteristic non-monotonic curvature of the H-c2(T). We also analyse the H-c2 for multiband bulk STO and find similar behaviour.

Place, publisher, year, edition, pages
2015. Vol. 28, no 8, 2373-2384 p.
Keyword [en]
LaAlO3/SrTiO3, LAO/STO, Upper critical field, Multiband superconductivity
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-119285DOI: 10.1007/s10948-015-3052-3ISI: 000357460600019OAI: oai:DiVA.org:su-119285DiVA: diva2:844320
Available from: 2015-08-05 Created: 2015-08-03 Last updated: 2017-12-04Bibliographically approved

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Balatsky, Alexander V.
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