{
  "id": "cond-mat/9809024",
  "version": "v1",
  "published": "1998-09-01T22:05:37.000Z",
  "updated": "1998-09-01T22:05:37.000Z",
  "title": "Transition from quantum Hall to compressible states in the second Landau level: new light on the $ν$=5/2 enigma",
  "authors": [
    "Rudolf H. Morf"
  ],
  "comment": "This paper has already appeared in PRL, but has not been on the web",
  "journal": "Phys. Rev. Lett. 80, 1505 (1998)",
  "doi": "10.1103/PhysRevLett.80.1505",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Quantum Hall states at filling fraction $\\nu$=5/2 are examined by numerical diagonalization. Spin-polarized and -unpolarized states of systems with $N\\le 18$ electrons are studied, neglecting effects of Landau level mixing. We find that the ground state is spin polarized. It is incompressible and has a large overlap with paired states like the Pfaffian. For a given sample, the energy gap is about 11 times smaller than at $\\nu$=1/3. Evidence is presented of phase transitions to compressible states, driven by the interaction strength at short distance. A reinterpretation of experiments is suggested.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1998-09-01T22:05:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "second landau level",
      "compressible states",
      "quantum hall states",
      "short distance",
      "interaction strength"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}