2014
DOI: 10.1103/physrevlett.112.216804
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Coherent Electronic Coupling in Atomically ThinMoSe2

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… Show more

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Cited by 126 publications
(121 citation statements)
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“…Unlike traditional semiconductors, the Coulomb interaction in monolayer TMDs is unusually strong because screening is greatly suppressed and spatial overlap of the interaction is much larger. This enhances the stability of a variety of excitonic quasiparticles with extremely large binding energies, including excitons [9][10][11][12][13][14][15][16][17] , trions [18][19][20] , and exciton-trion complexes 21 .…”
Section: Introductionmentioning
confidence: 99%
“…Unlike traditional semiconductors, the Coulomb interaction in monolayer TMDs is unusually strong because screening is greatly suppressed and spatial overlap of the interaction is much larger. This enhances the stability of a variety of excitonic quasiparticles with extremely large binding energies, including excitons [9][10][11][12][13][14][15][16][17] , trions [18][19][20] , and exciton-trion complexes 21 .…”
Section: Introductionmentioning
confidence: 99%
“…This material is very promising for valley index manipulation [24,25] with bright, well separated emission lines for neutral (X 0 ) and charged excitons (trions T) [11] shown in Fig. 1, which allows to investigate the valley physics for these complexes individually at low temperature.…”
mentioning
confidence: 99%
“…Among them molybdenum disulfide (MoS 2 ) and related layered quantum materials are particularly interesting due to their novel optical properties and potential valleytronics applications (4,5,8,9) at a thickness of monolayer and few layers (2,10,13). Layered materials share common physical properties rooted in their ubiquitous 2D quantum nature, for which achieving pure coherence among electrons (lattices) is of particular interest (14)(15)(16)(17)(18)(19). The presence of multiple domains is ubiquitous in many known 2D quantum materials, ranging from stripe-order cuprate superconductors to polycrystalline strongly correlated systems.…”
mentioning
confidence: 99%