{
  "id": "1302.4185",
  "version": "v1",
  "published": "2013-02-18T09:00:29.000Z",
  "updated": "2013-02-18T09:00:29.000Z",
  "title": "Terahertz conductivity of twisted bilayer graphene",
  "authors": [
    "Xingquan Zou",
    "Jingzhi Shang",
    "Jianing Leaw",
    "Zhiqiang Luo",
    "Liyan Luo",
    "Chan La-o-vorakiat",
    "Liang Cheng",
    "Haibin Su",
    "Jian-Xin Zhu",
    "Yanpeng Liu",
    "Kian Ping Loh",
    "A. H. Castro Neto",
    "Ting Yu",
    "Elbert E. M. Chia"
  ],
  "comment": "4 figures, 5 pages",
  "journal": "Phys. Rev. Lett. 110, 067401 (2013)",
  "doi": "10.1103/PhysRevLett.110.067401",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "Using terahertz time-domain spectroscopy, the real part of optical conductivity [$\\sigma_{1}(\\omega)$] of twisted bilayer graphene was obtained at different temperatures (10 -- 300 K) in the frequency range 0.3 -- 3 THz. On top of a Drude-like response, we see a strong peak in $\\sigma_{1} (\\omega)$ at $\\sim$2.7 THz. We analyze the overall Drude-like response using a disorder-dependent (unitary scattering) model, then attribute the peak at 2.7 THz to an enhanced density of states at that energy, that is caused by the presence of a van Hove singularity arising from a commensurate twisting of the two graphene layers.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-02-18T09:00:29.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "78.67.Wj",
      "72.80.Vp",
      "73.21.Ac",
      "81.05.ue"
    ],
    "keywords": [
      "twisted bilayer graphene",
      "terahertz conductivity",
      "terahertz time-domain spectroscopy",
      "graphene layers",
      "real part"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2013,
      "month": "Feb",
      "volume": 110,
      "number": 6,
      "pages": "067401"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvL.110f7401Z"
    }
  }
}