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Dark trions govern the temperature-dependent optical absorption and emission of doped atomically thin semiconductors

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  • معلومة اضافية
    • Contributors:
      Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G ); Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse); Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3); Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées; Université Toulouse III - Paul Sabatier (UT3); Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
    • بيانات النشر:
      HAL CCSD, 2020.
    • الموضوع:
      2020
    • نبذة مختصرة :
      We perform absorption and photoluminescence spectroscopy of trions in hBN-encapsulated WSe$_2$, WS$_2$, MoSe$_2$, and MoS$_2$ monolayers, depending on temperature. The different trends for W- and Mo-based materials are excellently reproduced considering a Fermi-Dirac distribution of bright and dark trions. We find a dark trion, $\rm{X_D^-}$ 19 meV $\textit{below}$ the lowest bright trion, $\rm{X}_1^-$ in WSe$_2$ and WS$_2$. In MoSe$_2$, $\rm{X_D^-}$ lies 6 meV $\textit{above}$ $\rm{X}_1^-$, while $\rm{X_D^-}$ and $\rm{X}_1^-$ almost coincide in MoS$_2$. Our results agree with GW-BSE $\textit{ab-initio}$ calculations and quantitatively explain the optical response of doped monolayers with temperature.
      Comment: 16 pages including supporting information, 4 figures in the main text, 10 figures in the supporting information
    • ISSN:
      2469-9950
      2469-9969
    • الرقم المعرف:
      10.1103/PhysRevB.101.241413⟩
    • Rights:
      OPEN
    • الرقم المعرف:
      edsair.doi.dedup.....0ada2b91b612dc867c5e6de1c1a09f0a