Robust Excitons and Trions in Monolayer MoTe2
Date
2015
Authors
Yang, Jiong
Lu, Tieyu
Win Myint, Ye
Pei, Jiajie
MacDonald, Daniel
Zheng, Jin-Cheng
Lu, Yuerui
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American Chemical Society
Abstract
Molybdenum telluride (MoTe<inf>2</inf>) 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 MoTe<inf>2</inf> 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 MoTe<inf>2</inf> 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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ACS Nano
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Journal article
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2037-12-31
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