Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 2: Superconductivity: Properties and Electronic Structure 1
TT 2.5: Vortrag
Montag, 20. März 2017, 10:30–10:45, HSZ 103
Manipulation of the branching of vortex nucleation in rolled-up superconductor microstructures — E. A. Levchenko1, R. O. Rezaev1,2, and •V. M. Fomin3 — 1Tomsk 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).