Coherent Electronic Coupling in Atomically Thin<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>MoSe</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Akshay Singh(The University of Texas at Austin), Galan Moody(The University of Texas at Austin), Sanfeng Wu(University of Washington), Yanwen Wu(University of South Carolina), N. Ghimire(University of Tennessee at Knoxville), Jiaqiang Yan(Oak Ridge National Laboratory), David Mandrus(Oak Ridge National Laboratory), Xiaodong Xu(University of Washington), Xiaoqin Li(The University of Texas at Austin)
Cited by 130Open Access
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 lineshape of the peaks reveals that the coupling originates from many-body interactions. Excellent agreement between the experiment and density matrix calculations suggests the formation of a correlated exciton-trion state due to their coupling.
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