Coherent electronic coupling in atomically thin MoSe2

Akshay Singh; Galan Moody; Sanfeng Wu; Yanwen Wu; Nirmal J. Ghimire; Jiaqiang Yan; David G. Mandrus; Xiaodong Xu; Xiaoqin Li

doi:10.1103/PhysRevLett.112.216804

Coherent electronic coupling in atomically thin MoSe2

Akshay Singh, Galan Moody, Sanfeng Wu, Yanwen Wu, Nirmal J. Ghimire, Jiaqiang Yan, David G. Mandrus, Xiaodong Xu, Xiaoqin Li

Correlated Electron Materials

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119 Scopus citations

Abstract

We report the first direct spectroscopic evidence for coherent electronic coupling between excitons and trions in atomically thin transition metal dichalcogenides, specifically monolayer MoSe2. Signatures of coupling appear as isolated cross-peaks in two-color pump-probe spectra, and the line shape of the peaks reveals that the coherent coupling originates from many-body interactions. Excellent agreement between the experiment and density matrix calculations suggests that coherent exciton-trion coupling leads to the formation of a correlated state with a remarkably large binding energy.

Original language	English
Article number	216804
Journal	Physical Review Letters
Volume	112
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.112.216804
State	Published - May 27 2014

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10.1103/PhysRevLett.112.216804

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title = "Coherent electronic coupling in atomically thin MoSe2",

abstract = "We report the first direct spectroscopic evidence for coherent electronic coupling between excitons and trions in atomically thin transition metal dichalcogenides, specifically monolayer MoSe2. Signatures of coupling appear as isolated cross-peaks in two-color pump-probe spectra, and the line shape of the peaks reveals that the coherent coupling originates from many-body interactions. Excellent agreement between the experiment and density matrix calculations suggests that coherent exciton-trion coupling leads to the formation of a correlated state with a remarkably large binding energy.",

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AU - Singh, Akshay

AU - Moody, Galan

AU - Wu, Sanfeng

AU - Wu, Yanwen

AU - Ghimire, Nirmal J.

AU - Yan, Jiaqiang

AU - Mandrus, David G.

AU - Xu, Xiaodong

AU - Li, Xiaoqin

PY - 2014/5/27

Y1 - 2014/5/27

N2 - We report the first direct spectroscopic evidence for coherent electronic coupling between excitons and trions in atomically thin transition metal dichalcogenides, specifically monolayer MoSe2. Signatures of coupling appear as isolated cross-peaks in two-color pump-probe spectra, and the line shape of the peaks reveals that the coherent coupling originates from many-body interactions. Excellent agreement between the experiment and density matrix calculations suggests that coherent exciton-trion coupling leads to the formation of a correlated state with a remarkably large binding energy.

AB - We report the first direct spectroscopic evidence for coherent electronic coupling between excitons and trions in atomically thin transition metal dichalcogenides, specifically monolayer MoSe2. Signatures of coupling appear as isolated cross-peaks in two-color pump-probe spectra, and the line shape of the peaks reveals that the coherent coupling originates from many-body interactions. Excellent agreement between the experiment and density matrix calculations suggests that coherent exciton-trion coupling leads to the formation of a correlated state with a remarkably large binding energy.

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JO - Physical Review Letters

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ER -

Coherent electronic coupling in atomically thin MoSe2

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