Trion induced negative photoconductivity in monolayer MoS2

Abstract

Optical excitation typically enhances electrical conduction and low-frequency radiation absorption in semiconductors. We have, however, observed a pronounced transient decrease of conductivity in doped monolayer molybdenum disulfide (MoS2), a two-dimensional (2D) semiconductor, under femtosecond laser excitation. In particular, the conductivity is reduced dramatically down to only 30% of its equilibrium value with high pump fluence. This anomalous phenomenon arises from the strong many-body interactions in the system, where photoexcited electron-hole pairs join the doping-induced charges to form trions, bound states of two electrons and one hole. The resultant increase of the carrier effective mass substantially diminishes the carrier conductivity.

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Cited by in corpus (49)

• Trion Formation Dynamics in Monolayer Transition Metal Dichalcogenides
• Neutral and Charged Inter-Valley Biexcitons in Monolayer MoSe${}_2$
• Intervalley biexcitons and many-body effects in monolayer MoS2
• Observation of exciton redshift-blueshift crossover in monolayer WS2
• Ultrafast THz probe of photo-induced polarons in lead-halide perovskites
• Gate tunable dark trions in monolayer WSe${}_2$
• Exciton diffusion in monolayer semiconductors with suppressed disorder
• Diffusion quantum Monte Carlo study of excitonic complexes in two-dimensional transition-metal dichalcogenides
• Coherent and Incoherent Coupling Dynamics between Neutral and Charged Excitons in Monolayer MoSe2
• Optically discriminating carrier-induced quasiparticle band gap and exciton energy renormalization in monolayer MoS2
• Photostrictive two-dimensional materials in the monochalcogenide family
• Excitons and trions in monolayer transition metal dichalcogenides: A comparative study between the multiband model and the quadratic single-band model
• Wavelength-Controlled Photocurrent Polarity Switching in BP-MoS${}_2$ Heterostructure
• Observation of Negative THz Photoconductivity in Large Area Type-II Dirac Semimetal PtTe2
• Valley Trion Dynamics in Monolayer MoSe${}_2$
• Nanotube-based one-dimensional heterostructures coupled by van der Waals forces
• Excitons, trions, and biexcitons in transition metal dichalcogenides: magnetic field dependence
• Trion Valley Coherence in Monolayer Semiconductors
• Layer Dependent Interfacial Transport and Optoelectrical Properties of MoS2 on Ultra-flat Metals
• Trion induced photoluminescence of a doped MoS2 monolayer
• Few-body systems in condensed matter physics
• Manipulation of exciton and trion quasiparticles in monolayer WS2 via charge transfer
• Two Dimensional Ferromagnetic Semiconductor: Monolayer CrGeS${}_3$
• Valley Degree of Freedom in Two-Dimensional van der Waals Materials
• Three-particle states and brightening of intervalley excitons in a doped MoS${}_2$ monolayer
• Spectral measurement of the breakdown limit of $\beta -G{a}_2{O}_3$ and tunnel ionization of self-trapped excitons and holes
• Excitonic complexes in anisotropic atomically thin two-dimensional materials: black phosphorus and TiS${}_3$
• Broadband ultra-high transmission of terahertz radiation through monolayer MoS${}_2$
• Photo-Hall effect spectroscopy with enhanced illumination in p-Cd1-xMnxTe showing negative differential photoconductivity
• On Binding Energy of Trions in Bulk Materials
• Light Induced Electron-Phonon Scattering Mediated Resistive Switching in Nanostructured Nb Thin Film Superconductor
• Nonequilibrium optical response of a one-dimensional Mott insulator
• Trion formation resolves observed peak shifts in the optical spectra of transition metal dichalcogenides
• Electronic excitations stabilised by a degenerate electron gas in semiconductors
• Long-lived population inversion in resonantly driven excitonic antiferromagnet
• Signatures of defect-localized charged excitons in the photoluminescence of monolayer molybdenum disulfide
• Pump-induced terahertz conductivity response and peculiar bound state in Mn3Si2Te6
• Electrostatic control of the trion fine structure in transition metal dichalcogenide monolayers
• Trion Engineered Multimodal Transistors in Two dimensional Bilayer Semiconductor Lateral Heterostructures
• Record negative photoconductivity in N-polar AlGaN/GaN quantum-well heterostructures
• Ultrafast Terahertz Probe of Transient Evolution of Charged and Neutral Phase of Photoexcited Electron-hole Gas in Monolayer Semiconductor
• Direct measurement of photoinduced transient conducting state in multilayer 2H-MoTe2
• Trion-phonon interaction in atomically thin semiconductors
• Characteristics of room temperature bipolar photoconductance in 150 GHz probe transients obtained from normal and irradiated silicon illuminated by 532 nm laser
• Semiclassical approach for excitonic spectrum of Coulomb coupling between two Dirac particles
• Negative Photoconductance in van der Waals Heterostructures-Based Floating Gate Phototransistor
• Low-dimensional quantum systems
• Temperature-driven Emergence of Negative Photoconductivity in Semimetal MoTe2 Film Probed with Terahertz Spectroscopy
• Phase Coherent Oscillations of Excitonic Photocapacitance and Bose-Einstein Condensation in Quantum Coupled 0D-2D Heterostructure