Topological superconductivity and Majorana fermions in RKKY systems.

  title={Topological superconductivity and Majorana fermions in RKKY systems.},
  author={Jelena Klinovaja and Peter Stano and Ali Mohammad Yazdani and Daniel Loss},
  journal={Physical review letters},
  volume={111 18},
We consider quasi-one-dimensional Ruderman-Kittel-Kasuya-Yosida (RKKY) systems in proximity to an s-wave superconductor. We show that a 2k(F) peak in the spin susceptibility of the superconductor in the one-dimensional limit supports helical order of localized magnetic moments via RKKY interaction, where k(F) is the Fermi wave vector. The magnetic helix is equivalent to a uniform magnetic field and very strong spin-orbit interaction (SOI) with an effective SOI length 1/2k(F). We find the… 

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  • New J. Phys
  • 2010

Subbands can arise from direct hopping inside the wire or indirect hopping via the superconductor, or even from coupled Shiba states induced by the magnetic moments 28