{
  "id": "cond-mat/0007216",
  "version": "v1",
  "published": "2000-07-12T21:40:21.000Z",
  "updated": "2000-07-12T21:40:21.000Z",
  "title": "Photoluminescence from fractional quantum Hall systems: Role of separation between electron and hole layers",
  "authors": [
    "Arkadiusz Wojs",
    "John J. Quinn"
  ],
  "comment": "12 pages, 5 figures, submitted to PRB",
  "journal": "Phys. Rev. B 63, 045304 (2001)",
  "doi": "10.1103/PhysRevB.63.045304",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "The photoluminescence (PL) spectrum of a two-dimensional electron gas (2DEG) in the fractional quantum Hall regime is studied as a function of the separation $d$ between the electron and valence hole layers. The abrupt change in the response of the 2DEG to the optically injected hole at $d$ of the order of the magnetic length $\\lambda$ results in a complete reconstruction of the PL spectrum. At $d<\\lambda$, the hole binds one or two electrons to form neutral ($X$) or charged ($X^-$) excitons, and the PL spectrum probes the lifetimes and binding energies of these states rather than the original correlations of the 2DEG. At $d>2\\lambda$, depending on the filling factor $\\nu$, the hole either decouples from the 2DEG to form an ``uncorrelated'' state $h$ or binds one or two Laughlin quasielectrons (QE) to form fractionally charged excitons $h$QE or $h$QE$_2$. The strict optical selection rules for bound states are formulated, and the only optically active ones turn out to be $h$, $h$QE* (an excited state of the dark $h$QE), and $h$QE$_2$. The ``anyon exciton'' $h$QE$_3$ suggested in earlier studies is neither stable nor radiative at any value of $d$. The critical dependence of the stability of different states on the presence of QE's in the 2DEG explains the observed anomalies in the PL spectrum at $\\nu={1\\over3}$ and ${2\\over3}$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-07-12T21:40:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "fractional quantum hall systems",
      "hole layers",
      "pl spectrum",
      "separation",
      "photoluminescence"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}