{
  "id": "1208.2619",
  "version": "v1",
  "published": "2012-08-13T15:48:22.000Z",
  "updated": "2012-08-13T15:48:22.000Z",
  "title": "Tunable photo-galvanic effect on topological insulator surfaces via proximity interactions",
  "authors": [
    "Yuriy G. Semenov",
    "Xiaodong Li",
    "Ki Wook Kim"
  ],
  "comment": "10 pages, 3 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "An unusual photo-galvanic effect is predicted on the topological insulator surface when its semi-metallic electronic spectrum is modified by an adjacent ferromagnet. The effect is correlated with light absorption in a wide frequency range (from a few to hundreds of meV) and produces a pronounced response that is not only resonant to the photon energy but also tunable by an external electrical bias. The exceptionally strong peak photocurrent of the order of $\\mu$A/cm may be achieved at elevated temperatures with the illumination power of 1 W/cm$^2$ in the THz range on Bi$_2$Se$_3$. These advantages could enable room-temperature detection of far-infrared radiation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-08-13T15:48:22.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "72.40.+w",
      "72.25.Fe",
      "78.68.+m",
      "72.80.Tm"
    ],
    "keywords": [
      "topological insulator surface",
      "tunable photo-galvanic effect",
      "proximity interactions",
      "unusual photo-galvanic effect",
      "semi-metallic electronic spectrum"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.86.201401",
      "journal": "Physical Review B",
      "year": 2012,
      "month": "Nov",
      "volume": 86,
      "number": 20,
      "pages": 201401
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvB..86t1401S"
    }
  }
}