{
  "id": "1212.1933",
  "version": "v1",
  "published": "2012-12-09T23:12:01.000Z",
  "updated": "2012-12-09T23:12:01.000Z",
  "title": "Interacting drift-diffusion theory for photoexcited electron-hole gratings in semiconductor quantum wells",
  "authors": [
    "Ka Shen",
    "G. Vignale"
  ],
  "comment": "5 pages, 5 figures",
  "journal": "Phys. Rev. Lett. 110, 096601 (2013)",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Phase-resolved transient grating spectroscopy in semiconductor quantum wells has been shown to be a powerful technique for measuring the electron-hole drag resistivity $\\rho_{eh}$, which depends on the Coulomb interaction between the carriers. In this paper we develop the interacting drift-diffusion theory, from which $\\rho_{eh}$ can be determined, given the measured mobility of an electron-hole grating. From this theory we predict a cross-over from a high-excitation-density regime, in which the mobility has the \"normal\" positive value, to a low-density regime, in which Coulomb-drag dominates and the mobility becomes negative. At the crossover point, the mobility of the grating vanishes.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-12-09T23:12:01.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "72.20.-i",
      "71.45.-d",
      "78.47.-p"
    ],
    "keywords": [
      "semiconductor quantum wells",
      "interacting drift-diffusion theory",
      "photoexcited electron-hole gratings",
      "electron-hole drag resistivity",
      "transient grating spectroscopy"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "doi": "10.1103/PhysRevLett.110.096601",
      "year": 2013,
      "month": "Mar",
      "volume": 110,
      "number": 9,
      "pages": "096601"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvL.110i6601S"
    }
  }
}