Simulation of rolled-up superconductor micro- and nanotubes
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REZAEV, R.; LEVCHENKO, E.; FOMIN, Vladimir. Simulation of rolled-up superconductor micro- and nanotubes. In: Materials Science and Condensed Matter Physics. Editia a 8-a, 12-16 septembrie 2016, Chişinău. Chişinău: Institutul de Fizică Aplicată, 2016, p. 49. ISBN 978-9975-9787-1-2.
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Materials Science and Condensed Matter Physics
Editia a 8-a, 2016
Conferința "International Conference on Materials Science and Condensed Matter Physics"
8-th Edition, Chişinău, Moldova, 12-16 septembrie 2016

Simulation of rolled-up superconductor micro- and nanotubes


Pag. 49-49

Rezaev R.12, Levchenko E.1, Fomin Vladimir3
 
1 National Research Tomsk State University,
2 National Research Nuclear University MEPhI, Moscow,
3 Leibniz Institute for Solid State and Materials Reseach, Dresden
 
Disponibil în IBN: 18 iulie 2019


Rezumat

Control over vortex dynamics in superconductor structures is realized by the guidance of vortices through predefined trajectories, for example, by the rectification of the average vortex movement [1]. The guidance can be implemented through an array of artificial pinning sites, which lead to a redistribution of the local current density [2]. Alternatively, technological advances in fabrication of rolled-up structures [3] provide an efficient tool to tailor superconducting properties of materials [4]. In such rolled-up tubes made from Nb, the vortex nucleation period is shown to be branched due to the combined influence of pinning centers [5] and the curvature.    We suggest to manipulate the branching in such a superconductor structure, where the current density distribution can be controlled locally near the positions of vortex nucleation. A possible implementation of this idea is to fabricate multiple mutually isolated electrodes, through which the transport current is introduced into the rolled-up structure (see Fig. 1).