{
  "id": "1105.6262",
  "version": "v1",
  "published": "2011-05-31T13:03:43.000Z",
  "updated": "2011-05-31T13:03:43.000Z",
  "title": "Helicity-dependent photocurrents in graphene layers excited by mid-infrared radiation of a CO$_2$-laser",
  "authors": [
    "Chongyun Jiang",
    "V. A. Shalygin",
    "V. Yu. Panevin",
    "S. N. Danilov",
    "M. M. Glazov",
    "R. Yakimova",
    "S. Lara-Avila",
    "S. Kubatkin",
    "S. D. Ganichev"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We report the study of the helicity driven photocurrents in graphene excited by mid-infrared light of a CO$_2$-laser. Illuminating an unbiased monolayer sheet of graphene with circularly polarized radiation generates -- under oblique incidence -- an electric current perpendicular to the plane of incidence, whose sign is reversed by switching the radiation helicity. We show that the current is caused by the interplay of the circular $ac$ Hall effect and the circular photogalvanic effect. Studying the frequency dependence of the current in graphene layers grown on the SiC substrate we observe that the current exhibits a resonance at frequencies matching the longitudinal optical phonon in SiC.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-05-31T13:03:43.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.50.Pz",
      "72.80.Vp",
      "81.05.ue",
      "78.67.Wj"
    ],
    "keywords": [
      "graphene layers",
      "helicity-dependent photocurrents",
      "mid-infrared radiation",
      "helicity driven photocurrents",
      "electric current perpendicular"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.84.125429",
      "journal": "Physical Review B",
      "year": 2011,
      "month": "Sep",
      "volume": 84,
      "number": 12,
      "pages": 125429
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011PhRvB..84l5429J"
    }
  }
}