{
  "id": "2007.05396",
  "version": "v1",
  "published": "2020-07-10T14:02:25.000Z",
  "updated": "2020-07-10T14:02:25.000Z",
  "title": "Autoionization and dressing of excited excitons by free carriers in monolayer WSe2",
  "authors": [
    "Koloman Wagner",
    "Edith Wietek",
    "Jonas D. Ziegler",
    "Marina Semina",
    "Takashi Taniguchi",
    "Kenji Watanabe",
    "Jonas Zipfel",
    "Mikhail M. Glazov",
    "Alexey Chernikov"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We experimentally demonstrate dressing of the excited exciton states by a continuously tunable Fermi sea of free charge carriers in a monolayer semiconductor. It represents an unusual scenario of two-particle excitations of charged excitons previously inaccessible in conventional material systems. We identify excited state trions, accurately determine their binding energies in the zero-density limit for both electron- and hole-doped regimes, and observe emerging many-body phenomena at elevated doping. Combining experiment and theory we gain access to the intra-exciton coupling facilitated by the interaction with free charge carriers. We provide evidence for a process of autoionization for quasiparticles, a unique scattering pathway available for excited states in atomic systems. Finally, we demonstrate a complete transfer of the optical transition strength from the excited excitons to dressed excitons, Fermi polarons, as well as the associated light emission from their non-equilibrium populations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-07-10T14:02:25.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "monolayer wse2",
      "free carriers",
      "free charge carriers",
      "autoionization",
      "conventional material systems"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}