{
  "id": "1111.1765",
  "version": "v2",
  "published": "2011-11-07T22:59:29.000Z",
  "updated": "2015-03-02T22:51:13.000Z",
  "title": "Persistent Current States in Bilayer Graphene",
  "authors": [
    "Jeil Jung",
    "Marco Polini",
    "Allan H. MacDonald"
  ],
  "comment": "6 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We argue that at finite carrier density and large displacement fields, bilayer graphene is prone to $\\ell =0$ and $\\ell = 1$ Pomeranchuk Fermi surface instabilities. The broken symmetries are driven by non-local exchange interactions which favor momentum space condensation. We find that electron-electron interactions lead first to spontaneous valley polarization, which breaks time-reversal invariance and is associated with spontaneous orbital magnetism, and then under some circumstances to a nematic phase with reduced rotational symmetry. When present, nematic order is signaled by reduced symmetry in the dependence of optical absorption on light polarization.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-11-07T22:59:29.000Z",
      "abstract": "Broken symmetry states that carry equilibrium currents were proposed some time ago by researchers seeking a microscopic theory of superconductivity, but have never been observed. In this Letter we point out that the unusual electronic structure of unbalanced bilayer graphene is particularly favorable for the realization of this interesting type of ordered state.",
      "comment": "5 pages, 3 figures",
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2015-03-02T22:51:13.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.22.Gk",
      "72.80.Vp",
      "73.22.Pr",
      "73.23.Ra"
    ],
    "keywords": [
      "persistent current states",
      "carry equilibrium currents",
      "broken symmetry states",
      "unusual electronic structure",
      "microscopic theory"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.91.155423",
      "journal": "Physical Review B",
      "year": 2015,
      "month": "Apr",
      "volume": 91,
      "number": 15,
      "pages": 155423
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015PhRvB..91o5423J"
    }
  }
}