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Dresden 2017 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 2: Superconductivity: Properties and Electronic Structure 1

TT 2.5: Talk

Monday, March 20, 2017, 10:30–10:45, HSZ 103

Manipulation of the branching of vortex nucleation in rolled-up superconductor microstructuresE. A. Levchenko1, R. O. Rezaev1,2, and •V. M. Fomin31Tomsk Polytechnic University, Tomsk, 634050, Russia — 2Moscow Engineering Physics Institute, Moscow, 115409, Russia — 3IFW Dresden, Insitute for Integrative Nanosciences, D-01069 Dresden

An inhomogeneous transport current, which is introduced through multiple electrodes in an open superconductor Nb microtube, is shown to lead to a controllable branching of the vortex nucleation period. The mechanism of this branching is revealed using the time-dependent Ginzburg–Landau equation for the applied magnetic field, which is orthogonal to the axis of the tube. The average number of vortices occurring in the tube per nanosecond can be effectively decreased using the inhomogeneous transport current, which is important for noise and energy dissipation reduction in superconductor applications [1]. The work was supported by the bilateral BMBF-Russia Grant 01DJ13009 and by the COST Action MP1201 “Nanoscale Superconductivity”.

[1] R. O. Rezaev, E. A. Levchenko, V. M. Fomin, Supercond. Sci. Technol. 29, 045014 (2016).

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