Robust Excitons and Trions in Monolayer MoTe2

Jiong Yang, Tieyu Lü, Ye Win Myint, Jiajie Pei, Daniel Macdonald, Jin Cheng Zheng, Yuerui Lu*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    158 Citations (Scopus)

    Abstract

    Molybdenum telluride (MoTe2) has emerged as a special member in the family of two-dimensional transition metal dichalcogenide semiconductors, owing to the strong spin-orbit coupling and relatively small energy gap, which offers new applications in valleytronic and excitonic devices. Here we successfully demonstrated the electrical modulation of negatively charged (X-), neutral (X0), and positively charged (X+) excitons in monolayer MoTe2 via photoluminescence spectroscopy. The binding energies of X+ and X- were measured to be -24 and -27 meV, respectively.The exciton binding energy of monolayer MoTe2 was measured to be 0.58 ± 0.08 eV via photoluminescence excitation spectroscopy, which matches well with our calculated value of 0.64 eV.

    Original languageEnglish
    Pages (from-to)6603-6609
    Number of pages7
    JournalACS Nano
    Volume9
    Issue number6
    DOIs
    Publication statusPublished - 23 Jun 2015

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