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Title
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Josephson vortex loops in nanostructured Josephson junctions
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Author
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Abstract
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| Linked and knotted vortex loops have recently received a revival of interest. Such three-dimensional topological entities have been observed in both classical-and super-fluids, as well as in optical systems. In superconductors, they remained obscure due to their instability against collapse - unless supported by inhomogeneous magnetic field. Here we reveal a new kind of vortex matter in superconductors -the Josephson vortex loops - formed and stabilized in planar junctions or layered superconductors as a result of nontrivial cutting and recombination of Josephson vortices around the barriers for their motion. Engineering latter barriers opens broad perspectives on loop manipulation and control of other possible knotted/linked/entangled vortex topologies in nanostructured superconductors. In the context of Josephson devices proposed to date, the high-frequency excitations of the Josephson loops can be utilized in future design of powerful emitters, tunable filters and waveguides of high-frequency electromagnetic radiation, thereby pushing forward the much needed Terahertz technology. |
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Language
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English
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Source (journal)
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Scientific reports. - London, 2011, currens
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Publication
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London
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Nature Publishing Group
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2018
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ISSN
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2045-2322
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DOI
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10.1038/S41598-018-21015-7
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Volume/pages
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8
(2018)
, 17 p.
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Article Reference
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2733
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ISI
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000424630400046
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Pubmed ID
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29426843
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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