Topological transitions in ac/dc-driven superconductor nanotubes

Autor(en)

Vladimir M. Fomin, Roman O. Rezaev, Oleksandr V. Dobrovolskiy

Abstrakt

Extending of nanostructures into the third dimension has become a major research avenue in condensed-matter physics, because of geometry- and topology-induced phenomena. In this regard, superconductor 3D nanoarchitectures feature magnetic field inhomogeneity, non-trivial topology of Meissner currents and complex dynamics of topological defects. Here, we investigate theoretically topological transitions in the dynamics of vortices and slips of the phase of the order parameter in open superconductor nanotubes under a modulated transport current. Relying upon the time-dependent Ginzburg–Landau equation, we reveal two distinct voltage regimes when (i) a dominant part of the tube is in either the normal or superconducting state and (ii) a complex interplay between vortices, phase-slip regions and screening currents determines a rich FFT voltage spectrum. Our findings unveil novel dynamical states in superconductor open nanotubes, such as paraxial and azimuthal phase-slip regions, their branching and coexistence with vortices, and allow for control of these states by superimposed dc and ac current stimuli.

Organisation(en)

Nanomagnetismus und Magnonik

Externe Organisation(en)

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Moldova State University, National Research Nuclear University MEPhl, Tomsk Polytechnic University

Journal

Scientific Reports

Band

12

Anzahl der Seiten

10

ISSN

2045-2322

DOI

https://doi.org/10.1038/s41598-022-13543-0

Publikationsdatum

2022

Peer-reviewed

Ja

ÖFOS 2012

103017 Magnetismus

ASJC Scopus Sachgebiete

General

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/64d6e92c-dc2b-4d54-9b3a-578bb60a93ae