Unconventional vortex states in nanoscale superconductors due to shape-induced resonances in the inhomogeneous cooper-pair condensate

L. F. Zhang, L. Covaci, M. V. Miloević, Golibjon Berdiyorov, F. M. Peeters

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Vortex matter in mesoscopic superconductors is known to be strongly affected by the geometry of the sample. Here we show that in nanoscale superconductors with coherence length comparable to the Fermi wavelength the shape resonances of the order parameter results in an additional contribution to the quantum topological confinement-leading to unconventional vortex configurations. Our Bogoliubov-de Gennes calculations in a square geometry reveal a plethora of asymmetric, giant multivortex, and vortex-antivortex structures, stable over a wide range of parameters and which are very different from those predicted by the Ginzburg-Landau theory. These unconventional states are relevant for high-T c nanograins, confined Bose-Einstein condensates, and graphene flakes with proximity-induced superconductivity.

Original languageEnglish
Article number107001
JournalPhysical Review Letters
Volume109
Issue number10
DOIs
Publication statusPublished - 4 Sep 2012
Externally publishedYes

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condensates
vortices
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flakes
geometry
Bose-Einstein condensates
proximity
graphene
superconductivity
configurations
wavelengths
Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Unconventional vortex states in nanoscale superconductors due to shape-induced resonances in the inhomogeneous cooper-pair condensate. / Zhang, L. F.; Covaci, L.; Miloević, M. V.; Berdiyorov, Golibjon; Peeters, F. M.

In: Physical Review Letters, Vol. 109, No. 10, 107001, 04.09.2012.

Research output: Contribution to journalArticle

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