{
  "id": "1612.03004",
  "version": "v1",
  "published": "2016-12-09T12:55:01.000Z",
  "updated": "2016-12-09T12:55:01.000Z",
  "title": "Excitonic valley effects in monolayer WS$_2$ under high magnetic fields",
  "authors": [
    "Gerd Plechinger",
    "Philipp Nagler",
    "Ashish Arora",
    "Andrés Granados del Águila",
    "Mariana V. Ballottin",
    "Tobias Frank",
    "Philipp Steinleitner",
    "Martin Gmitra",
    "Jaroslav Fabian",
    "Peter C. M. Christianen",
    "Rudolf Bratschitsch",
    "Christian Schüller",
    "Tobias Korn"
  ],
  "doi": "10.1021/acs.nanolett.6b04171",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Transition-metal dichalcogenides can be easily produced as atomically thin sheets, exhibiting the possibility to optically polarize and read out the valley pseudospin of extremely stable excitonic quasiparticles present in these 2D semiconductors. Here, we investigate a monolayer of tungsten disulphide in high magnetic fields up to 30\\,T via photoluminescence spectroscopy at low temperatures. The valley degeneracy is lifted for all optical features, particularly for excitons, singlet and triplet trions, for which we determine the g factor separately. While the observation of a diamagnetic shift of the exciton and trion resonances gives us insight into the real-space extension of these quasiparticles, magnetic field induced valley polarization effects shed light onto the exciton and trion dispersion relations in reciprocal space. The field dependence of the trion valley polarizations is in line with the predicted trion splitting into singlet and triplet configurations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-12-09T12:55:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high magnetic fields",
      "excitonic valley effects",
      "monolayer ws",
      "induced valley polarization effects",
      "polarization effects shed light"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "ACS"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}