title: Robust Excitons and Trions in Monolayer MoTe2.
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 (X(0)), 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.
authors.affiliation: †Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT, 0200, Australia.
authors.forename: Jiong
authors.initials: J
authors.lastname: Yang
authors.affiliation: ‡Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen, 361005, China.|¥Department of Physics, and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen, 361005, China.
authors.forename: Tieyu
authors.initials: T
authors.lastname: Lü
authors.affiliation: †Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT, 0200, Australia.
authors.forename: Ye Win
authors.initials: YW
authors.lastname: Myint
authors.affiliation: †Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT, 0200, Australia.|§School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
authors.forename: Jiajie
authors.initials: J
authors.lastname: Pei
authors.affiliation: †Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT, 0200, Australia.
authors.forename: Daniel
authors.initials: D
authors.lastname: Macdonald
authors.affiliation: ‡Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen, 361005, China.|¥Department of Physics, and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen, 361005, China.
authors.forename: Jin-Cheng
authors.initials: JC
authors.lastname: Zheng
authors.affiliation: †Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT, 0200, Australia.
authors.forename: Yuerui
authors.initials: Y
authors.lastname: Lu
keywords: MoTe2; exciton; trion; two-dimensional