{
  "id": "cond-mat/0111378",
  "version": "v1",
  "published": "2001-11-20T18:52:46.000Z",
  "updated": "2001-11-20T18:52:46.000Z",
  "title": "Tuning gaps and phases of a two-subband system in a quantizing magnetic field",
  "authors": [
    "V. M. Apalkov",
    "M. E. Portnoi"
  ],
  "journal": "Phys. Rev. B 65, 125310 (2002)",
  "doi": "10.1103/PhysRevB.65.125310",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "In this work we study the properties of a two-subband quasi-two-dimensional electron system in a strong magnetic field when the electron filling factor is equal to four. When the cyclotron energy is close to the intersubband splitting the system can be mapped onto a four-level electron system with an effective filling factor of two. The ground state is either a ferromagnetic state or a spin-singlet state, depending on the values of the inter-level splitting and Zeeman energy. The boundaries between these phases are strongly influenced by the inter-electron interaction. A significant exchange-mediated enhancement of the excitation gap results in the suppression of the electron-phonon interaction. The rate of absorption of non-equilibrium phonons is calculated as a function of Zeeman energy and inter-subband splitting. The phonon absorption rate has two peaks as a function of intersubband splitting and has a step-like structure as a function of Zeeman energy.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2001-11-20T18:52:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantizing magnetic field",
      "two-subband system",
      "tuning gaps",
      "zeeman energy",
      "two-subband quasi-two-dimensional electron system"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}