{
  "id": "cond-mat/0111377",
  "version": "v1",
  "published": "2001-11-20T19:10:05.000Z",
  "updated": "2001-11-20T19:10:05.000Z",
  "title": "Two-subband system in quantizing magnetic field: Probing many-body gap by non-equilibrium phonons",
  "authors": [
    "V. M. Apalkov",
    "M. E. Portnoi"
  ],
  "comment": "9 pages, 3 figures",
  "journal": "Physica E 15, 202 (2002)",
  "doi": "10.1016/S1386-9477(02)00554-4",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We study the many-body effects in a two-subband quasi-two-dimensional electron system in a quantizing magnetic field at filling factor three. A manifestation of these effects in the phonon absorption spectroscopy is discussed. The electron system is mapped onto a two-level system with the separation between levels determined by the intersubband splitting and the cyclotron energy. The electron-electron interaction enhances the excitation gap, which exists at all values of the interlevel splitting. This results in a single-peak structure of the phonon absorption rate as a function of magnetic field, instead of the double-peak structure for non-interacting electrons.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2001-11-20T19:10:05.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantizing magnetic field",
      "probing many-body gap",
      "two-subband system",
      "non-equilibrium phonons",
      "two-subband quasi-two-dimensional electron system"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}