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Upper Critical Field as a Probe for Multiband Superconductivity in Bulk and Interfacial STO
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
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:kth:diva-172487DOI: 10.1007/s10948-015-3052-3ISI: 000357460600019Scopus ID: 2-s2.0-84943358556OAI: oai:DiVA.org:kth-172487DiVA: diva2:848726
Funder
Swedish Research Council, 621-2012-2983EU, European Research Council, 321031-DM
Note

QC 20150826

Available from: 2015-08-26 Created: 2015-08-25 Last updated: 2017-12-04Bibliographically approved

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Edge, Jonathan M.Balatsky, Alexander V.
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