{
  "id": "1307.1442",
  "version": "v1",
  "published": "2013-07-04T18:18:03.000Z",
  "updated": "2013-07-04T18:18:03.000Z",
  "title": "Topological Superconductivity and Majorana Fermions in RKKY Systems",
  "authors": [
    "Jelena Klinovaja",
    "Peter Stano",
    "Ali Yazdani",
    "Daniel Loss"
  ],
  "journal": "Phys. Rev. Lett. 111, 186805 (2013)",
  "doi": "10.1103/PhysRevLett.111.186805",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We consider quasi one-dimensional 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 wavevector. 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 conditions to establish such a magnetic state in atomic chains and semiconducting nanowires with magnetic atoms or nuclear spins. Generically, these systems are in a topological phase with Majorana fermions. The inherent self-tuning of the helix to $2k_F$ eliminates the need to tune the chemical potential.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-07-04T18:18:03.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "71.10.Pm",
      "74.20.-z",
      "75.70.Tj",
      "75.75.-c"
    ],
    "keywords": [
      "majorana fermions",
      "topological superconductivity",
      "quasi one-dimensional rkky systems",
      "one-dimensional limit supports helical order",
      "strong spin-orbit interaction"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2013,
      "month": "Nov",
      "volume": 111,
      "number": 18,
      "pages": 186805
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvL.111r6805K"
    }
  }
}