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Magnetic behavior of dirty multiband superconductors near the upper critical field
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics.
2016 (English)In: PHYSICAL REVIEW B, ISSN 2469-9950, Vol. 93, no 21, 214509Article in journal (Refereed) Published
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Text
Abstract [en]

Magnetic properties of dirty multiband superconductors near the upper critical field are studied. The parameter kappa(2) characterizing magnetization slope is shown to have a significant temperature variation which is quite sensitive to the pairing interactions and relative strengths of intraband impurity scattering. In contrast to single-band superconductors the increase of kappa(2) at low temperatures can be arbitrarily large determined by the ratio of maximal and minimal diffusion coefficients in different bands. Temperature dependencies of kappa(2)(T) in two-band MgB2 and iron-based superconductors are shown to be much more sensitive to the multiband effects than the upper critical field H-c2(T).

Place, publisher, year, edition, pages
2016. Vol. 93, no 21, 214509
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-189807DOI: 10.1103/PhysRevB.93.214509ISI: 000378049300005Scopus ID: 2-s2.0-84976904242OAI: oai:DiVA.org:kth-189807DiVA: diva2:949466
Funder
Swedish Research Council, 642-2013-7837
Note

QC 20160719

Available from: 2016-07-19 Created: 2016-07-15 Last updated: 2016-07-19Bibliographically approved

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