Valley polarization in MoS2 monolayers by optical pumping

Abstract

We report experimental evidences on selective occupation of the degenerate valleys in MoS2 monolayers by circularly polarized optical pumping. Over 30% valley polarization has been observed at K and K' valley via the polarization resolved luminescence spectra on pristine MoS2 monolayers. It demonstrates one viable way to generate and detect valley polarization towards the conceptual valleytronics applications with information carried by the valley index.

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Cited by in corpus (192)

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• Measurement of the optical dielectric function of transition metal dichalcogenide monolayers: MoS2, MoSe2, WS2 and WSe2
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• k.p theory for two-dimensional transition metal dichalcogenide semiconductors
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• Magnetic Control of Valley Pseudospin in Monolayer WSe2
• Valley Zeeman Effect in Elementary Optical Excitations of a Monolayer WSe2
• Breaking of valley degeneracy by magnetic field in monolayer MoSe2
• Evolution of Interlayer Coupling in Twisted MoS2 Bilayers
• Non-linear Optical Spectroscopy of Excited Exciton States for Efficient Valley Coherence Generation in WSe2 Monolayers
• Electrical Control of Second-Harmonic Generation in a WSe2 Monolayer Transistor
• Valley Splitting and Polarization by the Zeeman Effect in Monolayer MoSe2
• Mono- and Bilayer WS2 Light-Emitting Transistors
• Robust optical emission polarization in MoS2 monolayers through selective valley excitation
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• Probing excitonic states in ultraclean suspended two-dimensional semiconductors by photocurrent spectroscopy
• Light Generation and Harvesting in a Van der Waals Heterostructure
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• Generation and Electric Control of Spin-Coupled Valley Current in WSe2
• Coupling the valley degree of freedom to antiferromagnetic order
• Interlayer Exciton Optoelectronics in a 2D Heterostructure p-n Junction
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• Spin-Valleytronics in Silicene: Quantum-Spin-Quantum-Anomalous Hall Insulators and Single-Valley Semimetals
• Ultrafast Generation of Pseudo-magnetic Field for Valley Excitons in WSe2 Monolayers
• Topological Polaritons
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• Helicity resolved Raman scattering of MoS2, MoSe2, WS2 and WSe2 atomic layers
• Theory of optical absorption by interlayer excitons in transition metal dichalcogenide heterobilayers
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• Intervalley Scattering and Localization Behaviors of Spin-Valley Coupled Dirac Fermions
• Valley-spin polarized Landau levels in a monolayer semiconductor
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• Unconventional Quantum Hall Effect and Tunable Spin Hall Effect in MoS2 Trilayers
• Possible Topological Superconducting Phases of MoS${}_2$
• Polarization and time-resolved photoluminescence spectroscopy of excitons in MoSe2 monolayers
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• Possibility of Combining Ferroelectricity and Rashba-like spin splitting in Monolayers of 1T-type Transition-Metal Dichalcogenides MX2
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• Nonlinear valley and spin currents from Fermi pocket anisotropy in 2D crystals
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• Large tunneling magnetoresistance in VSe2/MoS2 magnetic tunnel junction
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• Probing of valley polarization in graphene via optical second-harmonic generation
• Two-Dimensional Valley Electrons and Excitons in Noncentrosymmetric 3R MoS${}_2$
• Many-body effects in nonlinear optical responses of 2D layered semiconductors
• Optical generation and detection of pure valley current in monolayer transition metal dichalcogenides
• Trion Species-Resolved Quantum Beats in MoSe2
• The valley filter efficiency of monolayer graphene and bilayer graphene line defect model
• Towards colloidal spintronics through Rashba spin-orbit interaction in lead sulphide nanosheets
• Tunable Circular Dichroism and Valley Polarization in the Modified Haldane Model
• Intrinsic optical conductivity of modified-Dirac fermion systems
• Landau-quantized excitonic absorption and luminescence in a monolayer valley semiconductor
• Spin-resolved optical conductivity of two-dimensional group-VIB transition-metal dichalcogenides
• Electronic and optical excitations of two-dimensional ZrS${}_2$ and HfS${}_2$ and their heterostructure
• Experimental Progress on Layered Topological Semimetals
• Symmetry-forbidden intervalley scattering by atomic defects in monolayer transition-metal dichalcogenides
• Yu-Shiba-Rusinov states of impurities in a triangular lattice of NbSe${}_2$ with spin orbit coupling
• Valley-Polarized Exciton Dynamics in Exfoliated Monolayer WSe${}_2$
• Optical selection rules for excitonic Rydberg series in the massive Dirac cones of hexagonal 2D materials
• Tunable thermoelectricity in monolayers of MoS${}_2$ and other group-VI dichalcogenides
• Edge pseudo-magnetoplasmons
• All-optical injection of charge, spin and valley currents in monolayer transition metal dichalcogenides
• Circular Dichroism and Radial Hall Effects in Topological Materials
• Dimensionality reduction and band quantization induced by potassium intercalation in 1$T$-HfTe${}_2$
• Dynamics of Symmetry-Breaking Stacking Boundaries in Bilayer MoS2
• Population pulsation resonances of excitons in monolayer MoSe2 with sub 1 μeV linewidth
• Electronic Structure of Exfoliated Millimeter-Sized Monolayer WSe2 on Silicon Wafer
• Optical Spin Polarization Dynamics in GaSe Nanoslabs
• Near Unity Optical Spin Polarization in GaSe Nanoslabs
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• Valley Dynamics of Excitons in Monolayer Dichalcogenides
• Charge Neutral MoS2 Field Effect Transistors Through Oxygen Plasma Treatment
• Spin-dependent Refraction at the Atomic Step of Transition-metal Dichalcogenides
• Observation of Ultralong Valley Lifetime in WSe2/MoS2 Heterostructures
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• Zero point motion and direct/indirect bandgap crossover in layered transition-metal dichalcogenides
• Photo-induced valley currents in strained graphene
• Long-lived spin polarization in n-doped MoSe${}_2$ monolayers
• Stability of Polarized States for Diamond Valleytronics
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• Chiral topological excitons in the monolayer transition metal dichalcogenides
• Theory of Unconventional Spin States in Surfaces with Non-Rashba Spin-Orbit Interaction
• Probing valley filtering effect by Andreev reflection in zigzag graphene nanoribbon
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• Chiral Topological Excitons in a Chern Band Insulator
• Revealing the nature of excitons in liquid exfoliated monolayer WS2
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• Gate-controlled valley transport and Goos-Hänchen effect in monolayer WS${}_2$
• Orbital-dependent quasiparticle scattering interference in 3R-NbS2
• Gate-controlled supercurrent reversal in MoS${}_2$-based Josephson junctions
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• Optical fingerprint of non-covalently functionalized transition metal dichalcogenides
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• A spincaloritronic battery
• Signatures of Electronic Nematicity in (111) LaAlO${}_3$/SrTiO${}_3$ Interfaces
• Theory optical excitation spectra and depolarization dynamics in bilayer WS${}_2$ from viewpoint of excimers
• Multi-component plasmons in monolayer MoS${}_2$ with circularly polarized optical pumping
• Control of Spin Diffusion and Suppression of the Hanle Effect by the Coexistence of Spin and Valley Hall Effects
• Multi-terminal electrical transport measurements of molybdenum disulphide using van der Waals heterostructure device platform
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• Momentum selective optical absorption in triptycene molecular membrane
• Theory of field-modulated spin-valley-orbital pseudospin physics
• Stacking sequence determines Raman intensities of observed interlayer shear modes in 2D layered materials - A general bond polarizability model
• Spin relaxation and the Kondo effect in transition metal dichalcogenide monolayers
• A Se vacancy induced localized Raman mode in two-dimensional MoSe2 grown by CVD
• Etching-free transfer of wafer-scale MoS2 films
• Valley polarization generated in 3-dimensional group-IV monochalcogenids
• Insights into vibrational and electronic properties of MoS${}_2$ using Raman, photoluminescence and transport studies
• Interaction between the small gas molecules and the defective WSe2 monolayer
• Enhanced Valley Zeeman Splitting in Fe-Doped Monolayer MoS2
• Single Quantum Emitters in Monolayer Semiconductors
• Nonlinear optics in the electron-hole continuum in 2D semiconductors: two-photon transition, second harmonic generation and valley current injection
• Room temperature interlayer exciton valley polarization and valley Hall effect