Magnetochiral vortex ratchet effect in two-dimensional arrays of -Josephson junctions
S Reinhardt, AG Penner, J Berger… - arXiv preprint arXiv …, 2024 - arxiv.org
arXiv preprint arXiv:2406.13819, 2024•arxiv.org
We demonstrate transport in 2D arrays of multiterminal $\varphi_0 $-junctions. When
applying an in-plane magnetic field we observe nonreciprocal vortex depinning currents,
induced by a ratchet-like pinning potential. The ratchet effect is explained as a consequence
of spontaneous supercurrents that arise in the presence of next-nearest neighbor
Josephson couplings. Tuning the density of vortices to commensurate values of the
frustration parameter results in an enhancement of the ratchet effect. In addition, we find a …
applying an in-plane magnetic field we observe nonreciprocal vortex depinning currents,
induced by a ratchet-like pinning potential. The ratchet effect is explained as a consequence
of spontaneous supercurrents that arise in the presence of next-nearest neighbor
Josephson couplings. Tuning the density of vortices to commensurate values of the
frustration parameter results in an enhancement of the ratchet effect. In addition, we find a …
We demonstrate transport in 2D arrays of multiterminal -junctions. When applying an in-plane magnetic field we observe nonreciprocal vortex depinning currents, induced by a ratchet-like pinning potential. The ratchet effect is explained as a consequence of spontaneous supercurrents that arise in the presence of next-nearest neighbor Josephson couplings. Tuning the density of vortices to commensurate values of the frustration parameter results in an enhancement of the ratchet effect. In addition, we find a surprising sign reversal of the ratchet effect near frustration 1/3.
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