{
  "id": "1603.02572",
  "version": "v1",
  "published": "2016-03-08T16:21:31.000Z",
  "updated": "2016-03-08T16:21:31.000Z",
  "title": "Spin-flip processes and radiative decay of dark intravalley excitons in transition metal dichalcogenide monolayers",
  "authors": [
    "A. O. Slobodeniuk",
    "D. M. Basko"
  ],
  "comment": "17 pages, 3 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We perform a theoretical study of radiative decay of dark intravalley excitons in transition metal dichalcogenide monolayers. This decay necessarily involves an electronic spin flip. The intrinsic decay mechanism due to interband spin-flip dipole moment perpendicular to the monolayer plane, gives a rate about 100--1000 times smaller than that of bright excitons. However, we find that this mechanism also introduces an energy splitting due to a local field effect, and the whole oscillator strength is contained in the higher-energy component, while the lowest-energy state remains dark and needs an extrinsic spin-flip mechanism for the decay. Rashba effect due to a perpendicular electric field or a dielectric substrate, gives a negligible radiative decay rate (about $10^7$ times slower than that of bright excitons). Spin flip due to Zeeman effect in a sufficiently strong in-plane magnetic field can give a decay rate comparable to that due to the intrinsic interband spin-flip dipole.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-03-08T16:21:31.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "transition metal dichalcogenide monolayers",
      "dark intravalley excitons",
      "radiative decay",
      "spin-flip dipole moment perpendicular",
      "spin-flip processes"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2016arXiv160302572S"
    }
  }
}