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

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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 languageEnglish (US)
Article number216804
JournalPhysical review letters
Volume112
Issue number21
DOIs
StatePublished - May 27 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Singh, A., Moody, G., Wu, S., Wu, Y., Ghimire, N. J., Yan, J., Mandrus, D. G., Xu, X., & Li, X. (2014). Coherent electronic coupling in atomically thin MoSe2. Physical review letters, 112(21), [216804]. https://doi.org/10.1103/PhysRevLett.112.216804