Coherent Electronic Coupling in Atomically ThinMoSe2

2014/01/09 by Akshay Singh, Galan Moody, Sanfeng Wu +8 · 5 citations
Engineering · Materials Science · Physics and Astronomy · #2D Materials and Applications #Condensed matter physics #Coupling (piping) #Exciton #Materials science #Molecular physics #Monolayer #Nanotechnology #Perovskite Materials and Applications #Physics #Quantum Dots Synthesis And Properties #Quantum mechanics #Spectral line #Trion #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.112.216804

published as Phys. Rev. Lett. 112, 216804 (2014) · 5 pages, 3 figures

arxiv created 2014/01/09 · openalex publication_date 2014/05/27 · arxiv updated 2014/09/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06

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.

Citations

• Evidence for wavelike energy transfer through quantum coherence in photosynthetic systems
• Valley polarization in MoS2 monolayers by optical pumping
• Valley-selective circular dichroism of monolayer molybdenum disulphide
• Exciton Dynamics in Suspended Monolayer and Few-Layer MoS2 2D Crystals

Cited by

• Weakly Trapped, Charged, and Free Excitons in Single-Layer MoS2 in the Presence of Defects, Strain, and Charged Impurities
• Ultrafast Dynamics of Rydberg Excitons and Their Optically Induced Charged Complexes in Encapsulated WSe2 Monolayers
• Room temperature observation of biexcitons in exfoliated WS2 monolayers
• Trion formation dynamics in monolayer transition metal dichalcogenides
• Trion-Induced Negative Photoconductivity in MonolayerMoS2

Related

• Coherent Interaction of 2s and 1s Exciton States in Transition-Metal Dichalcogenide Monolayers
• Asymmetric trions in monolayer transition metal dichalcogenides
• Interlayer exciton dynamics in van der Waals heterostructures
• Exciton-based sensing of remote electron correlations in 2D heterostructures
• Quasi-steady electron-excitonic complexes coupling in a two-dimensional semiconductor