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Magnetic Field Delocalization and Flux Inversion in Fractional Vortices in Two-Component Superconductors
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics.
2009 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 103, no 23Article in journal (Refereed) Published
Abstract [en]

We demonstrate that, in contrast with the single-component Abrikosov vortex, in two-component superconductors vortex solutions with an exponentially screened magnetic field exist only in exceptional cases: in the case of vortices carrying an integer number of flux quanta and in a special parameter limit for half-quantum vortices. For all other parameters, the vortex solutions have a delocalized magnetic field with a slowly decaying tail. Furthermore, we demonstrate a new effect which is generic in two-component systems but has no counterpart in single-component systems: on exactly half of the parameter space of the U(1)xU(1) Ginzburg-Landau model, the magnetic field of a generic fractional vortex inverts its direction at a certain distance from the vortex core.

Place, publisher, year, edition, pages
2009. Vol. 103, no 23
Keyword [en]
superfluid
Identifiers
URN: urn:nbn:se:kth:diva-19021DOI: 10.1103/PhysRevLett.103.237002ISI: 000272460200036Scopus ID: 2-s2.0-71449124307OAI: oai:DiVA.org:kth-19021DiVA: diva2:337068
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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