{
  "id": "1401.0415",
  "version": "v3",
  "published": "2014-01-02T11:10:39.000Z",
  "updated": "2014-09-27T15:00:35.000Z",
  "title": "Topological Spin Texture in a Quantum Anomalous Hall Insulator",
  "authors": [
    "Jiansheng Wu",
    "Jie Liu",
    "Xiong-Jun Liu"
  ],
  "comment": "5 pages manuscript, 8+ pages supplementary information, 8 figures; published version",
  "journal": "Phys. Rev. Lett. 113, 136403 (2014)",
  "doi": "10.1103/PhysRevLett.113.136403",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "The quantum anomalous Hall (QAH) effect has been recently discovered in experiment using thin-film topological insulator with ferromagnetic ordering and strong spin-orbit coupling. Here we investigate the spin degree of freedom of a QAH insulator and uncover a fundamental phenomenon that the edge states exhibit topologically stable spin texture in the boundary when a chiral-like symmetry is present. This result shows that edge states are chiral in both the orbital and spin degrees of freedom, and the chiral edge spin texture corresponds to the bulk topological states of the QAH insulator. We also study the potential applications of the edge spin texture in designing topological-state-based spin devices which might be applicable to future spintronic technologies.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2014-01-06T12:30:53.000Z",
      "title": "Topological Spin Texture in Quantum Anomalous Hall Insulator",
      "abstract": "The quantum anomalous Hall (QAH) insulator, also called Chern insulator, is a two-dimensional (2D) topological state of quantum matter which exhibits a gap in the bulk and chiral gapless edge states in the boundary. Different from the quantum Hall effect driven by external magnetic fields, the QAH effect applies no magnetic field, and in the recent experimental discovery the spin-orbit coupling and ferromagnetic ordering are essential to reach this state. In this work, we find a novel phenomenon in the Chern insulator that the edge states are chiral in both the orbital and spin degrees of freedom when a chiral-like symmetry is present, and exhibit topologically stable spin texture in the position space. The chiral edge spin texture has no correspondence in the conventional trivial materials, and may have potential applications in designing topological-state-based spin devices which might be applicable to future spintronic technologies.",
      "comment": "5 pages manuscript, 8+ pages supplementary information, 8 figures",
      "journal": null,
      "doi": null
    },
    {
      "version": "v3",
      "updated": "2014-09-27T15:00:35.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "71.10.Pm",
      "73.50.-h",
      "73.63.-b"
    ],
    "keywords": [
      "quantum anomalous hall insulator",
      "topological spin texture",
      "chiral edge spin texture",
      "quantum hall effect driven",
      "edge states"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2014,
      "month": "Sep",
      "volume": 113,
      "number": 13,
      "pages": 136403
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014PhRvL.113m6403W"
    }
  }
}