Vortex ring and helical current formation in superconductors driven by a 
THz‐field‐induced toroidal vector potential

Niedzielski, Björn; Berakdar, Jamal

doi:10.1002/pssb.202100622

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Vortex ring and helical current formation in superconductors driven by a THz‐field‐induced toroidal vector potential

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Niedzielski, Björn
External Organizations;
International Max Planck Research School for Science and Technology of Nano-Systems, Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1002/pssb.202100622
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Citation

Niedzielski, B., & Berakdar, J. (2022). Vortex ring and helical current formation in superconductors driven by a THz‐field‐induced toroidal vector potential. Physica Status Solidi B, 259(6): 2100622. doi:10.1002/pssb.202100622.

Cite as: https://hdl.handle.net/21.11116/0000-000A-DC4D-9

Abstract

Herein, the vortex dynamics in a type II superconducting torus driven by a curl-free vector potential corresponding to a toroidal moment is studied, which is triggered within picoseconds in an enclosed semiconductor by polarization-structured THz vector field pulses. Numerical simulations of the time-dependent Ginzburg–Landau equation in the presence of the toroidal vector potential evidence the formation of vortex ring structures that depend on the toroidal moment strength with a behavior resembling the Little–Parks effect. Applying in addition a static external magnetic flux density, the induced textures in the superconducting phase can be stabilized and steered to form stripe domains with corresponding helical supercurrent density.