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Rezaev et al 2020, Topological transitions in superconductor nanomembranes.pdf2.85 MBAdobe PDFView/Open
Title: Topological transitions in superconductor nanomembranes under a strong transport current
Authors: Rezaev, R.O.Smirnova, E.I.Schmidt, O.G.Fomin, M.
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Issue Date: 2020
Published in: Communication Physics Vol. 3 (2020)
Publisher: Washington, D.C. : American Association for the Advancement of Science
Abstract: The topological defects, vortices in bulk superconductors (SCs) and phase slips in low-dimensional SCs are known to lead to the occurrence of a finite resistance. We report on a topological transition between the both types of topological defects under a strong transport current in an open SC nanotube with a submicron-scale inhomogeneity of the normal-to-the-surface component of the applied magnetic field. When the magnetic field is orthogonal to the axis of the nanotube, which carries the transport current in the azimuthal direction, the phase-slip regime is characterized by the vortex/antivortex lifetime ∼ 10−14 s versus the vortex lifetime ∼ 10−11 s for vortex chains in the half-tubes, and the induced voltage shows a pulse as a function of the magnetic field. The topological transition between the vortex-chain and phase-slip regimes determines the magnetic-field–voltage and current–voltage characteristics of curved SC nanomembranes to pursue high-performance applications in advanced electronics and quantum computing.
Keywords: topological defects; superconductors (SCs); topological transition
DDC: 530
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