{
  "id": "1211.3802",
  "version": "v1",
  "published": "2012-11-16T06:19:22.000Z",
  "updated": "2012-11-16T06:19:22.000Z",
  "title": "Topological phases in gated bilayer graphene: Effects of Rashba spin-orbit coupling and exchange field",
  "authors": [
    "Zhenhua Qiao",
    "Xiao Li",
    "Wang-Kong Tse",
    "Hua Jiang",
    "Yugui Yao",
    "Qian Niu"
  ],
  "comment": "15 pages, 17figures, and 1 table",
  "journal": "Phys. Rev. B 87, 125405 (2013)",
  "doi": "10.1103/PhysRevB.87.125405",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We present a systematic study on the influence of Rashba spin-orbit coupling, interlayer potential difference and exchange field on the topological properties of bilayer graphene. In the presence of only Rashba spin-orbit coupling and interlayer potential difference, the band gap opening due to broken out-of-plane inversion symmetry offers new possibilities of realizing tunable topological phase transitions by varying an external gate voltage. We find a two-dimensional $Z_2$ topological insulator phase and a quantum valley Hall phase in $AB$-stacked bilayer graphene and obtain their effective low-energy Hamiltonians near the Dirac points. For $AA$ stacking, we do not find any topological insulator phase in the presence of large Rashba spin-orbit coupling. When the exchange field is also turned on, the bilayer system exhibits a rich variety of topological phases including a quantum anomalous Hall phase, and we obtain the phase diagram as a function of the Rashba spin-orbit coupling, interlayer potential difference, and exchange field.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-11-16T06:19:22.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.22.Pr",
      "73.43.Cd",
      "71.70.Ej",
      "73.43.-f"
    ],
    "keywords": [
      "rashba spin-orbit coupling",
      "exchange field",
      "gated bilayer graphene",
      "interlayer potential difference",
      "tunable topological phase transitions"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2013,
      "month": "Mar",
      "volume": 87,
      "number": 12,
      "pages": 125405
    },
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvB..87l5405Q"
    }
  }
}