Robust Excitons and Trions in Monolayer MoTe2

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

doi:10.1021/acsnano.5b02665

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 journal › Article › peer-review

172 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 language	English
Pages (from-to)	6603-6609
Number of pages	7
Journal	ACS Nano
Volume	9
Issue number	6
DOIs	https://doi.org/10.1021/acsnano.5b02665
Publication status	Published - 23 Jun 2015

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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 (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.",

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author = "Jiong Yang and Tieyu L{\"u} and Myint, \{Ye Win\} and Jiajie Pei and Daniel Macdonald and Zheng, \{Jin Cheng\} and Yuerui Lu",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

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doi = "10.1021/acsnano.5b02665",

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T1 - Robust Excitons and Trions in Monolayer MoTe2

AU - Yang, Jiong

AU - Lü, Tieyu

AU - Myint, Ye Win

AU - Pei, Jiajie

AU - Macdonald, Daniel

AU - Zheng, Jin Cheng

AU - Lu, Yuerui

PY - 2015/6/23

Y1 - 2015/6/23

N2 - 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.

AB - 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.

KW - MoTe

KW - exciton

KW - trion

KW - two-dimensional

UR - https://www.scopus.com/pages/publications/84934944873

U2 - 10.1021/acsnano.5b02665

DO - 10.1021/acsnano.5b02665

M3 - Article

SN - 1936-0851

VL - 9

SP - 6603

EP - 6609

JO - ACS Nano

JF - ACS Nano

IS - 6

ER -

Robust Excitons and Trions in Monolayer MoTe₂

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