# Topological superconductivity and Majorana fermions in RKKY systems.

@article{Klinovaja2013TopologicalSA, 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}, year={2013}, volume={111 18}, pages={ 186805 } }

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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