Josephson anomalous vortices
Josephson anomalous vortices
We show that vortices with circulating current, related with odd-frequency triplet pairing, appear in Josephson junctions where the barrier is a weak ferromagnet with strong spin-orbit coupling. By both symmetry analysis and microscopic methods we show that there is an additional term - a rotary invariant - in the superconducting free energy which allows for magnetoelectric effects even when the previously considered Lifshitz invariant vanishes. We show that the size, shape, and position of these vortices can be controlled by manipulating Rashba spin-orbit coupling in the weak link, via gates, and we suggest that these vortices could be detected via scanning magnetometry techniques. We also show that the transverse triplet components of the superconducting correlations can form a texture.
Dan Crawford、Stefan Ili?、Pauli Virtanen、Tero T. Heikkil?
电工基础理论
Dan Crawford,Stefan Ili?,Pauli Virtanen,Tero T. Heikkil?.Josephson anomalous vortices[EB/OL].(2025-04-24)[2025-05-23].https://arxiv.org/abs/2504.17779.点此复制
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