{
  "id": "0710.1921",
  "version": "v1",
  "published": "2007-10-10T04:11:06.000Z",
  "updated": "2007-10-10T04:11:06.000Z",
  "title": "Spin Order in Paired Quantum Hall States",
  "authors": [
    "Ivailo Dimov",
    "Bertrand I. Halperin",
    "Chetan Nayak"
  ],
  "journal": "Phys. Rev. Lett. 100, 126804 (2008)",
  "doi": "10.1103/PhysRevLett.100.126804",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We consider quantum Hall states at even-denominator filling fractions, especially $\\nu=5/2$, in the limit of small Zeeman energy. Assuming that a paired quantum Hall state forms, we study spin ordering and its interplay with pairing. We give numerical evidence that at $\\nu = 5/2$ an incompressible ground state will exhibit spontaneous ferromagnetism. The Ginzburg-Landau theory for the spin degrees of freedom of paired Hall states is a perturbed CP$^2$ model. We compute the coefficients in the Ginzburg-Landau theory by a BCS-Stoner mean field theory for coexisting order parameters, and show that even if repulsion is smaller than that required for a Stoner instability, ferromagnetic fluctuations can induce a partially or fully polarized superconducting state.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2007-10-10T04:11:06.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.43.-f",
      "71.70.Ej",
      "72.25.Dc",
      "85.75.-d"
    ],
    "keywords": [
      "spin order",
      "paired quantum hall state forms",
      "ginzburg-landau theory",
      "bcs-stoner mean field theory",
      "small zeeman energy"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2008,
      "month": "Mar",
      "volume": 100,
      "number": 12,
      "pages": 126804
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvL.100l6804D"
    }
  }
}