Gate tunable dark trions in monolayer WSe
arXiv:1901.11043 · doi:10.1103/PhysRevLett.123.027401
Abstract
We report the observation and gate manipulation of intrinsic dark trions in monolayer WSe. By using ultraclean WSe devices encapsulated by boron nitride, we directly resolve the weak photoluminescence of dark trions. The dark trions can be tuned continuously between negative and positive charged trions with electrostatic gating. We also reveal their spin triplet configuration and distinct valley optical emission by their characteristic Zeeman splitting under magnetic field. The dark trions exhibit large binding energy (14-16 meV). Their lifetime (~1.3 ns) is two orders of magnitude longer than the bright trion lifetime (~10 ps) and can be tuned between 0.4 to 1.3 ns by electrostatic gating. Such robust, optically detectable, and gate tunable dark trions provide a new path to realize electrically controllable trion transport in two-dimensional materials.
arXiv comment26 pages, 16 figures
References in corpus (38)
- Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
- Control of valley polarization in monolayer MoS2 by optical helicity
- Valley polarization in MoS2 monolayers by optical pumping
- Observation of tightly bound trions in monolayer MoS2
- MoS_2 as an ideal material for valleytronics: valley-selective circular dichroism and valley Hall effect
- Excitons in atomically thin transition metal dichalcogenides
- Electrical Control of Two-Dimensional Neutral and Charged Excitons in a Monolayer Semiconductor
- Optical Generation of Excitonic Valley Coherence in Monolayer WSe2
- k.p theory for two-dimensional transition metal dichalcogenide semiconductors
- Probing Excitonic Dark States in Single-layer Tungsten Disulfide
- Three-band tight-binding model for monolayers of group-VIB transition metal dichalcogenides
- 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
- Fermi polaron-polaritons in charge-tunable atomically thin semiconductors
- Valley Splitting and Polarization by the Zeeman Effect in Monolayer MoSe2
- Exciton Radiative Lifetime in Transition Metal Dichalcogenide Monolayers
- Magnetic brightening and control of dark excitons in monolayer WSe2
- Large spin splitting in the conduction band of transition metal dichalcogenide monolayers
- Valley dynamics probed through charged and neutral exciton emission in monolayer WSe2
- In-plane Propagation of Light in Transition Metal Dichalcogenide Monolayers: Optical Selection Rules
- Probing dark excitons in atomically thin semiconductors via near-field coupling to surface plasmon polaritons
- Valley excitons in two-dimensional semiconductors
- High-Mobility Holes in Dual-Gated WSe Field-Effect Transistors
- Charged excitons in monolayer WSe: experiment and theory
- Splitting between Bright and Dark excitons in Transition Metal Dichalcogenide Monolayers
- Trion induced negative photoconductivity in monolayer MoS2
- Many-Body Theory of Trion Absorption Features in Two-Dimensional Semiconductors
- Charge-tuneable biexciton complexes in monolayer WSe
- Revealing the Biexciton and Trion-exciton Complexes in BN Encapsulated WSe2
- Brightening of dark excitons in monolayers of semiconducting transition metal dichalcogenides
- Radiative control of dark excitons at room temperature by nano-optical antenna-tip induced Purcell effect
- Fine Structure and Lifetime of Dark Excitons in Transition Metal Dichalcogenide Monolayers
- Coulomb-bound four- and five-particle valleytronic states in an atomically-thin semiconductor
- Giant Zeeman splitting inducing near-unity valley polarization in van der Waals heterostructures
- Cross-over from trion-hole to exciton-polaron in n-doped semiconductor quantum wells
- Dark trions and biexcitons in WS2 and WSe2 made bright by e-e scattering
- Strong Valley Zeeman Effect of Dark Excitons in Monolayer Transition Metal Dichalcogenides in a Tilted Magnetic Field
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- Valley Phonons and Exciton Complexes in a Monolayer Semiconductor
- Phonon-assisted Photoluminescence from Dark Excitons in Monolayers of Transition Metal Dichalcogenides
- Electroluminescence from multi-particle exciton complexes in transition metal dichalcogenide semiconductors
- Correlated interlayer exciton insulator in double layers of monolayer WSe2 and moiré WS2/WSe2
- Momentum-Dark Intervalley Exciton in Monolayer Tungsten Diselenide Brightened via Chiral Phonon
- Valley-selective chiral phonon replicas of dark excitons and trions in monolayer WSe2
- Direct Observation of Gate Tunable Dark Trions in Monolayer WSe2
- Multipath optical recombination of intervalley dark excitons and trions in monolayer WSe
- Energy spectrum of two-dimensional excitons in a non-uniform dielectric medium
- Exciton g-factors in monolayer and bilayer WSe from experiment and theory
- Probing and manipulating valley coherence of dark excitons in monolayer WSe
- Exciton optics, dynamics and transport in atomically thin semiconductors
- Strain control of hybridization between dark and localized excitons in a 2D semiconductor
- Probing dark exciton navigation through a local strain landscape in a WSe monolayer
- Dark trions govern the temperature-dependent optical absorption and emission of doped atomically thin semiconductors
- Valley Zeeman effect and Landau levels in Two-Dimensional Transition Metal Dichalcogenides
- Excitonic complexes in -doped WS monolayer
- Intrinsic Donor-Bound Excitons in Ultraclean Monolayer Semiconductors
- Magnetooptics of layered two-dimensional semiconductors and heterostructures: progress and prospects
- Relaxation and darkening of excitonic complexes in electrostatically-doped monolayer semiconductors: Roles of exciton-electron and trion-electron interactions
- Valley relaxation of resident electrons and holes in a monolayer semiconductor: Dependence on carrier density and the role of substrate-induced disorder
- Unveiling valley lifetimes of free charge carriers in monolayer WSe
- Neutral and charged dark excitons in monolayer WS
- Landau-quantized excitonic absorption and luminescence in a monolayer valley semiconductor
- Temporal evolution of low-temperature phonon sidebands in WSe monolayers
- Up- and Down-Conversion between Intra- and Inter-Valley Excitons in Waveguide Coupled Monolayer WSe2
- Trion photoluminescence and trion stability in atomically thin semiconductors
- Interplay of Excitonic Complexes in -Doped WSe Monolayers
- Radially polarized light beams from spin-forbidden dark excitons and trions in monolayer WSe
- Probing biexciton in monolayer WS through controlled many-body interaction
- Variationally optimized orbital approach to trions in two-dimensional materials
- Valley-Filling Instability and Critical Magnetic Field for Interaction-Enhanced Zeeman Response in Doped WSe Monolayers
- Charge Density Wave Activated Excitons in TiSe-MoSe Heterostructures
- Excited-State Trions in Two Dimensional Materials
- The effect of dielectric environment on the brightening of neutral and charged dark excitons in WSe monolayer
- Intervalley electron-hole exchange interaction and impurity-assisted recombination of indirect excitons in WS and WSe monolayers
- Trion-trion annihilation in monolayer WS
- Excitons and trions in WSSe monolayers
- Raman scattering excitation in monolayers of semiconducting transition metal dichalcogenides
- Doping-induced non-Markovian interference causes excitonic linewidth broadening in monolayer WSe
- Magneto-Optical Measurements of the Negatively Charged 2 Exciton in WSe
- Engineering Purcell factor anisotropy for dark and bright excitons in two dimensional semiconductors
- Spin/Valley pumping of resident electrons in WSe2 and WS2 monolayers
- Multidimensional sensing of proximity magnetic fields via intrinsic activation of dark excitons in WSe/CrCl heterostructure
- Single charge control of localized excitons in heterostructures with ferroelectric thin films and two-dimensional transition metal dichalcogenides
- Extremely high excitonic -factors in 2D crystals by alloy-induced admixing of band states
- Trion transfer in mixed-dimensional heterostructures
- Brightening dark excitons and trions in systems with a Mexican-hat energy dispersion: example of InSe
- Unconventional bright ground-state excitons in monolayer TiI from first-principles calculations
- Uniform Narrow Excitonic Spectrum in Large-Area Suspended WSe2 Monolayers
- Radiative Decay of Dark Exciton Related Emission in a Sandwiched Monolayer WSe2 Revealed by Room Temperature Micro and Nano Photoluminescence