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- W3160997677 abstract "Lack of time-reversal and space-inversion symmetries has a profound impact on superconductivity. One of the most extraordinary effects, due to the application of a magnetic field, is represented by the Abrikosov vortices with charged supercurrents circulating around their cores. Whether a similar quantum state can be obtained in non-centrosymmetric materials or by breaking inversion through electric fields is a fundamentally relevant but not yet fully settled problem. Here, we show that in spin-singlet superconductors without spatial inversion symmetry, vortices with orbitally polarized supercurrents flowing around the core can form and be energetically stable with respect to uniform states. The vortex has zero net magnetic flux since it is made up of counter-propagating Cooper pairs with opposite angular momentum associated to orbital motion. The formation of the vortex phase is driven by the Rashba-like coupling between the atomic angular momentum ${bf L}$ and the crystal wave-vector ${bf k}$. We describe the pairing structure of the orbital vortex and we evaluate both the distribution pattern of the orbital currents around the core and the conditions for the vortex stability. Predictions and proposals for the experimental detection are finally discussed." @default.
- W3160997677 created "2021-05-24" @default.
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- W3160997677 date "2021-05-19" @default.
- W3160997677 modified "2023-09-27" @default.
- W3160997677 title "Zero magnetic-field orbital vortices in non-centrosymmetric superconductors" @default.
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