期刊
ACS NANO
卷 9, 期 6, 页码 6603-6609出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b02665
关键词
MoTe2; exciton; trion; two-dimensional
类别
资金
- ANU
- China Scholarship Council
- Australian Research Council [DE140100805]
- ANU Major Equipment Committee [14MEC34]
- National Science Foundation of China [U1232110]
- Australian Research Council [DE140100805] Funding Source: Australian Research Council
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 (X-0), and positively charged (X+) excitons in monolayer MoTe2 via photoluminescence spectroscopy. The binding energies of X+ and X- were measured to be similar to 24 and similar to 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.
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