{
  "id": "1308.5664",
  "version": "v2",
  "published": "2013-08-26T19:48:24.000Z",
  "updated": "2013-09-09T23:34:58.000Z",
  "title": "Topological superconductivity at the edge of transition metal dichalcogenides",
  "authors": [
    "Gang Xu",
    "Jing Wang",
    "Binghai Yan",
    "Xiao-Liang Qi"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci",
    "cond-mat.supr-con"
  ],
  "abstract": "Time-reversal breaking topological superconductors are new states of matter which can support Majorana zero modes at the edge. In this paper, we propose a new realization of one-dimensional topological superconductivity and Majorana zero modes. The proposed system consists of a monolayer of transition metal dichalcogenides MX2 (M=Mo, W; X=S, Se) on top of a superconducting substrate. Based on first-principles calculations, we show that a zigzag edge of the monolayer MX2 terminated by metal atom M has edge states with strong spin-orbit coupling and spontaneous magnetization. By proximity coupling with a superconducting substrate, topological superconductivity can be induced at such an edge. We propose NbS2 as a natural choice of substrate, and estimate the proximity induced superconducting gap based on first-principles calculation and low energy effective model. As an experimental consequence of our theory, we predict that Majorana zero modes can be detected at the 120 degree corner of a MX2 flake in proximity with a superconducting substrate.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2013-09-09T23:34:58.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.20.-r",
      "74.45.+c",
      "75.70.Tj"
    ],
    "keywords": [
      "topological superconductivity",
      "superconducting substrate",
      "support majorana zero modes",
      "transition metal dichalcogenides mx2",
      "first-principles calculation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.90.100505",
      "journal": "Physical Review B",
      "year": 2014,
      "month": "Sep",
      "volume": 90,
      "number": 10,
      "pages": 100505
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014PhRvB..90j0505X"
    }
  }
}