{
  "id": "1305.7314",
  "version": "v2",
  "published": "2013-05-31T07:16:49.000Z",
  "updated": "2013-11-11T04:14:54.000Z",
  "title": "Spin-resoloved chiral condensate as a spin-unpolarized ν=0 quantum Hall state in graphene",
  "authors": [
    "Yuji Hamamoto",
    "Tohru Kawarabayashi",
    "Hideo Aoki",
    "Yasuhiro Hatsugai"
  ],
  "comment": "6 pages, 4 figures. Phys. Rev. B, to be published",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Motivated by the recent experiments indicating a spin-unpolarized \\nu=0 quantum Hall state in graphene, we theoretically investigate the ground state based on the many-body problem projected onto the n=0 Landau level. For an effective model with the on-site Coulomb repulsion and antiferromagnetic exchange couplings, we show that the ground state is a doubly-degenerate spin-resolved chiral condensate in which all the zero-energy states with up spin are condensed into one chirality, while those with down spin to the other. This can be exactly shown for an Ising-type exchange interaction. The charge gap due to the on-site repulsion in the ground state is shown to grow linearly with the magnetic field, in qualitative agreement with the experiments.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2013-11-11T04:14:54.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.22.Pr",
      "71.10.Fd",
      "73.43.-f"
    ],
    "keywords": [
      "quantum hall state",
      "spin-resoloved chiral condensate",
      "ground state",
      "ising-type exchange interaction"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.88.195141",
      "journal": "Physical Review B",
      "year": 2013,
      "month": "Nov",
      "volume": 88,
      "number": 19,
      "pages": 195141
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvB..88s5141H"
    }
  }
}