Josephson vortex loops in nanostructured Josephson junctions

G. R. Berdiyorov, M. V. Milošević, F. Kusmartsev, F. M. Peeters, S. Savel'ev

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


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.

Original languageBritish English
Article number2733
Pages (from-to)2733
Number of pages1
JournalScientific Reports
Issue number1
StatePublished - 9 Feb 2018


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