Trion Formation Dynamics in Monolayer Transition Metal Dichalcogenides

Abstract

We report charged exciton (trion) formation dynamics in doped monolayer transition metal dichalcogenides (TMDs), specifically molybdenum diselenide (MoSe2), using resonant two-color pump-probe spectroscopy. When resonantly pumping the exciton transition, trions are generated on a picosecond timescale through exciton-electron interaction. As the pump energy is tuned from the high energy to low energy side of the inhomogeneously broadened exciton resonance, the trion formation time increases by ~ 50%. This feature can be explained by the existence of both localized and delocalized excitons in a disordered potential and suggests the existence of an exciton mobility edge in TMDs. The quasiparticle formation and conversion processes are important for interpreting photoluminescence and photoconductivity in TMDs.

6 pages, 4 figures; accepted to PRB rapid

References in corpus (7)

• Tightly bound excitons in monolayer WSe2
• Photocurrent generation with two-dimensional van der Waals semiconductors
• Breaking of valley degeneracy by magnetic field in monolayer MoSe2
• Exciton Binding Energy of Monolayer WS2
• Trion induced negative photoconductivity in monolayer MoS2
• Spin and valley dynamics of excitons in transition metal dichalcogenides monolayers
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Cited by in corpus (61)

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• Exciton Radiative Lifetime in Transition Metal Dichalcogenide Monolayers
• Neutral and Charged Inter-Valley Biexcitons in Monolayer MoSe${}_2$
• Exciton Dynamics in Monolayer Transition Metal Dichalcogenides
• Double Indirect Interlayer Exciton in a MoSe2/WSe2 van der Waals Heterostructure
• Exciton and trion dynamics in atomically thin MoSe2 and WSe2: effect of localization
• Biexciton fine structure in monolayer transition metal dichalcogenides
• The ultrafast onset of exciton formation in 2D semiconductors
• Long-Lived Valley Polarization of Intra-Valley Trions in Monolayer WSe2
• Coherent and Incoherent Coupling Dynamics between Neutral and Charged Excitons in Monolayer MoSe2
• Exciton optics, dynamics and transport in atomically thin semiconductors
• Electrically tunable organic-inorganic hybrid polaritons with monolayer WS2
• Enhanced interlayer neutral excitons and trions in trilayer van der Waals heterostructures
• Valley Trion Dynamics in Monolayer MoSe${}_2$
• Light-Matter Interactions in Two-Dimensional Transition Metal Dichalcogenides: Dominant Excitonic Transitions in mono- and few-layer MoX${}_2$ and Band Nesting
• Phonon-assisted oscillatory exciton dynamics in monolayer MoSe2
• Exciton-polaron interactions in monolayer WS${}_2$
• Trion Valley Coherence in Monolayer Semiconductors
• Valley polarized relaxation and upconversion luminescence from Tamm-Plasmon Trion-Polaritons with a MoSe2 monolayer
• Theoretical investigation of electron-hole complexes in anisotropic two-dimensional materials
• Trion induced photoluminescence of a doped MoS2 monolayer
• Radiative lifetime of localized excitons in transition metal dichalcogenides
• Enhanced trion emission in monolayer MoSe2 by constructing a type-I van der Waals heterostructure
• Prolonging Valley Polarization Lifetime through Gate-Controlled Exciton-to-Trion Conversion in Monolayer Molybdenum Ditelluride
• Valley Degree of Freedom in Two-Dimensional van der Waals Materials
• Tunable optical nonlinearity for TMD polaritons dressed by a Fermi sea
• Ultrafast photocurrents in MoSe${}_2$ probed by terahertz spectroscopy
• Defect Passivation of 2D Semiconductors by Fixating Chemisorbed Oxygen Molecules via h-BN Encapsulations
• Phonon-assisted exciton and trion conversion efficiency in transition metal Dichalcogenides
• Inter-layer charge transport controlled by exciton-trion coherent coupling
• Valley Dynamics of Excitons in Monolayer Dichalcogenides
• Three-particle states and brightening of intervalley excitons in a doped MoS${}_2$ monolayer
• Charged exctions in two-dimensional transition-metal dichalcogenides - semiclassical calculation of Berry-curvature effects
• Disorder Dependent Valley Properties in Monolayer WSe2
• Resonantly excited exciton dynamics in two-dimensional MoSe${}_2$ monolayers
• Microscopic theory of exciton and trion polaritons in doped monolayers of transition metal dichalcogenides
• Probing biexciton in monolayer WS${}_2$ through controlled many-body interaction
• Wigner Crystals in Two-Dimensional Transition-Metal Dichalcogenides: Spin Physics and Readout
• Enhanced spin lifetimes in a two dimensional electron gas in a gate-controlled GaAs quantum well
• Excitonic theory of doping-dependent optical response in atomically thin semiconductors
• Light-matter coupling and non-equilibrium dynamics of exchange-split trions in monolayer WS2
• Combined tensor network/cluster expansion method using logic gates: Illustrated for (bi-)excitons by a single layer MoS${}_2$ model system
• Trion-trion annihilation in monolayer WS${}_2$
• Ultrafast Chirality-dependent Dynamics from Helicity-resolved Transient Absorption Spectroscopy
• Theory of the Coherent Response of Magneto-Excitons and Magneto-Biexcitons in Monolayer Transition Metal Dichalcogenides
• Pump-triple sum-frequency-probe spectroscopy of transition metal dichalcogenides
• Tensor network strategies for calculating biexcitons and trions in monolayer 2D materials beyond the ground state
• Gate-tunable trion switch for excitonic device applications
• Effect of intravalley and intervalley electron-hole exchange on the nonlinear optical response of monolayer MoSe${}_2$
• Interplay of trapped species and absence of electron capture in Moiré heterobilayers
• Efficient calculation of trion energies in monolayer transition metal dichalcogenides
• Signatures of defect-localized charged excitons in the photoluminescence of monolayer molybdenum disulfide
• Spin/Valley pumping of resident electrons in WSe2 and WS2 monolayers
• Electrostatic control of the trion fine structure in transition metal dichalcogenide monolayers
• Exciton Mott Transition in Two-Dimensional Semiconductors
• Theory of interlayer exciton dynamics in 2D TMDCs Heterolayers under the influence of strain reconstruction and disorder
• Brightening dark excitons and trions in systems with a Mexican-hat energy dispersion: example of InSe
• Trion-phonon interaction in atomically thin semiconductors
• Semiclassical approach for excitonic spectrum of Coulomb coupling between two Dirac particles
• Ultrafast Charge Transfer Dynamics at the MoS${}_2$/Au Interface Observed via Optical Spectroscopy under Ambient Conditions
• Polarimetry of photon echo on charged and neutral excitons in CdTe/(Cd,Mg)Te quantum wells