Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 97: Superconducting Diodes and Ratchets
TT 97.9: Talk
Friday, March 13, 2026, 11:45–12:00, CHE/0089
Steering of Vortex Jets in Anisotropic Pinning Fields — •Ekaterina Pribytova1 and Oleksandr Dobrovolskiy2 — 1Brno University of Technology, Czechia — 2Technische Universität Braunschweig, Germany
Understanding how Abrikosov vortices penetrate and move in superconductor films is crucial for fluxonics, which treats vortices as quantized information bits. So far, vortex steering was achieved for their global dynamics across the entire superconductor constriction. Here, we take a different approach of local vortex dynamics [1]: vortices are injected via an edge defect (notch) and guided through a washboard pinning potential (WPP). The resulting arrangement of vortices is a diverging jet rather than a periodic lattice. Numerical modeling via the time-dependent Ginzburg-Landau equation [2] reveals that vortex jets can be focused, deflected, and directed toward given points along the edge opposite to the notch. The underlying vortex steering mechanism is based on the competing vortex-vortex, vortex-current, and vortex-pinning interactions [1]. In return, beyond their potential for fluxonic logic gates, steered vortex jets offer a tool for probing these interactions. Specifically, the vortex jet’s opening angle estimates the magnetic penetration depth, while its deflection from the current-normal direction reveals the WPP strength. These results demonstrate the predictive power of TDGL modeling for nanoengineered fluxonic circuits and complement the analytical and experimental results.
[1] Bezuglyj et al., Phys. Rev. B 105 (2022) 214507.
[2] Bishop-Van Horn, Comput. Phys. Commun. 291 (2023) 108799.
Keywords: vortex; TDGL; washboard pinning potential