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Title: Thermodynamically stable non composite vortices in mesoscopic two-gap superconductors
Authors: Chibotaru, Liviu ×
Dao, Vu Hung
Ceulemans, Arnout #
Issue Date: 3-May-2007
Publisher: Editions de Physique
Series Title: Europhysics Letters vol:78 issue:4
Article number: 47001
Abstract: In mesoscopic two-gap superconductors with sizes of the order of the coherence length noncomposite vortices are found to be thermodynamically stable in a large domain of the T-H phase diagram. In these phases the vortex cores of one condensate are spatially separated from the other condensate ones, and their respective distributions can adopt distinct symmetries. The appearance of these vortex phases is caused by a non-negligible effect of the boundary of the sample on the superconducting order parameter and represents therefore a genuine mesoscopic effect. For low values of interband Josephson coupling vortex patterns with L-1 not equal L-2 can arise in addition to the phases with L-1 = L-2, where L-1 and L-2 are total vorticities in the two condensates. The calculations show that noncomposite vortices could be observed in thin mesoscopic samples of MgB2.
ISSN: 0295-5075
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Quantum Chemistry and Physical Chemistry Section
× corresponding author
# (joint) last author

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