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Vortices with magnetic field inversion in noncentrosymmetric superconductors

Abstract : Superconducting materials with noncentrosymmetric lattices lacking space inversion symmetry exhibit a variety of interesting parity-breaking phenomena, including the magnetoelectric effect, spin-polarized currents, helical states, and the unusual Josephson effect. We demonstrate, within a Ginzburg-Landau framework describing noncentrosymmetric superconductors with O point group symmetry, that vortices can exhibit an inversion of the magnetic field at a certain distance from the vortex core. In stark contrast to conventional superconducting vortices, the magnetic-field reversal in the parity-broken superconductor leads to nonmonotonic intervortex forces, and, as a consequence, to the exotic properties of the vortex matter such as the formation of vortex bound states, vortex clusters, and the appearance of metastable vortex/antivortex bound states.
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Julien Garaud, Maxim N. Chernodub, Dmitri E. Kharzeev. Vortices with magnetic field inversion in noncentrosymmetric superconductors. Physical Review B, American Physical Society, 2020, 102 (18), pp.184516. ⟨10.1103/PhysRevB.102.184516⟩. ⟨hal-02542879⟩

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