{
  "id": "0708.1959",
  "version": "v2",
  "published": "2007-08-14T20:54:27.000Z",
  "updated": "2007-12-05T15:41:25.000Z",
  "title": "The zero-energy state in graphene in a high magnetic field",
  "authors": [
    "Joseph G. Checkelsky",
    "Lu Li",
    "N. P. Ong"
  ],
  "comment": "4 pages, 4 figures. Four new sub-figures have been added. Text expanded to discuss data from more samples",
  "journal": "Phys. Rev. Lett. 100, 206801 (2008)",
  "doi": "10.1103/PhysRevLett.100.206801",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "The fate of the charge-neutral Dirac point in graphene in a high magnetic field $H$ has been investigated at low temperatures ($T\\sim$ 0.3 K). In samples with small $V_0$ (the gate voltage needed to access the Dirac point), the resistance $R_0$ at the Dirac point diverges steeply with $H$, signalling a crossover to an insulating state in intense field. The approach to the insulating state is highly unusual. Despite the steep divergence in $R_0$, the profile of $R_0$ vs. $T$ in fixed $H$ saturates to a $T$-independent value below 2 K, consistent with charge carrying gapless excitations.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2007-12-05T15:41:25.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.63.-b",
      "73.21.-b",
      "73.43.-f"
    ],
    "keywords": [
      "high magnetic field",
      "zero-energy state",
      "charge-neutral dirac point",
      "insulating state",
      "charge carrying gapless excitations"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2008,
      "month": "May",
      "volume": 100,
      "number": 20,
      "pages": 206801
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvL.100t6801C"
    }
  }
}