Magneto-spectroscopy probe of exciton-electron interactions in monolayer MoSe2

ORAL

Abstract

Coulomb interaction driven many-body effects are expected to modify significantly the quasiparticles properties in monolayer transition metal dichalcogenides at high carrier densities. Here we report on low temperature magneto- photoluminescence and broadband reflection contrast measurements on high quality monolayer MoSe2 over a wide doping range. A valley g-factor around 4 is measured in the low-density regime, which is consistent with the value deduced from the single particle picture. As the carrier density increases, one can access the strongly interacting regime and observe a pronounced change of the valley magnetic response. The observed strong modification of the valley g-factor in highly doped MoSe2 will be discussed and compared to the previously reported results on WSe2 [1].

[1]. PRL 120, 066402 (2018)

–

Presenters

  • Zhengguang Lu

    • National High Magnetic Field Laboratory
    • National High Magnetic Field Lab
    • Condensed Matter Science, National High Magnetic Field Laboratory

Authors

  • Zhengguang Lu

    • National High Magnetic Field Laboratory
    • National High Magnetic Field Lab
    • Condensed Matter Science, National High Magnetic Field Laboratory

  • Zhipeng Li

    • Rensselaer Polytechnic Institute
    • Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute

  • Tianmeng Wang

    • Rensselaer Polytechnic Institute
    • Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute

  • Yuze Meng

    • Nanjing University
    • Rensselaer Polytechnic Institute
    • Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute

  • Yuxuan Jiang

    • National High Magnetic Field Laboratory

  • Sufei Shi

    • Rensselaer Polytechnic Institute
    • Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute

  • Dmitry Smirnov

    • National High Magnetic Field Laboratory
    • Natl High Magnetic Field Lab
    • National High Magnetic Field Lab
    • Condensed Matter Science, National High Magnetic Field Laboratory