Topological defects in open superconducting nanotubes after gradual and abrupt switching of the transport current and magnetic field

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Abstract
We analyze dynamics of the order parameter in superconductor open nanotubes under a strong transport current in an external homogeneous magnetic field using the time-dependent Ginzburg-Landau equation. Near the critical transport current, the dissipation processes are driven by vortex and phase-slip dynamics. A transition between the vortex and phase-slip regimes is found to depend on the external magnetic field only weakly if the magnetic field and/or transport current are switched on gradually. In the case of an abrupt switch-on of the magnetic field or transport current, the system can be triggered to the stable phase-slip regime within a certain window of parameters. Finally, a hysteresis effect in the current-voltage characteristics is predicted in superconductor open nanotubes.
Funding Information
  • Deutsche Forschungsgemeinschaft (FO 956/6-1)
  • European Cooperation in Science and Technology (CA16218)
  • Technische Universität Dresden

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