Excitonic Stark effect in MoS${}_2$ monolayers

Abstract

We theoretically investigate excitons in MoS${}_2$ monolayers in an applied in-plane electric field. Tight-binding and Bethe-Salpeter equation calculations predict a quadratic Stark shift, of the order of a few meV for fields of 10 V/$\mu$m, in the linear absorption spectra. The spectral weight of the main exciton peaks decreases by a few percent with an increasing electric field due to the exciton field ionization into free carriers as reflected in the exciton wave functions. Subpicosecond exciton decay lifetimes at fields of a few tens of V/$\mu$m could be utilized in solar energy harvesting and photodetection. We find simple scaling relations of the exciton binding, radius, and oscillator strength with the dielectric environment and an electric field, which provides a path to engineering the MoS${}_2$ electro-optical response.

9 pages, 7 figures

References in corpus (19)

• Valley polarization in MoS2 monolayers by optical pumping
• The Valley Hall Effect in MoS2 Transistors
• Observation of giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
• Tightly bound excitons in monolayer WSe2
• k.p theory for two-dimensional transition metal dichalcogenide semiconductors
• Probing Excitonic Dark States in Single-layer Tungsten Disulfide
• Quasiparticle band structures and optical properties of strained monolayer MoS2 and WS2
• Valley Zeeman Effect in Elementary Optical Excitations of a Monolayer WSe2
• Exciton Binding Energy of Monolayer WS2
• Mechanisms of photoconductivity in atomically thin MoS2
• Non-linear Optical Spectroscopy of Excited Exciton States for Efficient Valley Coherence Generation in WSe2 Monolayers
• High-temperature superfluidity with indirect excitons in van der Waals heterostructures
• Exciton band structure of monolayer MoS2
• Measurement of high exciton binding energy in the monolayer transition-metal dichalcogenides WS2 and WSe2
• Ultrafast Generation of Pseudo-magnetic Field for Valley Excitons in WSe2 Monolayers
• Stark effect spectroscopy of mono- and few-layer MoS${}_2$
• Three-particle Complexes in Two-Dimensional Semiconductors
• Anisotropic exciton Stark shift in black phosphorus
• Inverse Funnel Effect of Excitons in Strained Black Phosphorus

Cited by in corpus (31)

• Dissociation of two-dimensional excitons in monolayer WSe2
• Magnetic Proximity Effects in Transition-Metal Dichalcogenides: Converting Excitons
• Exciton-exciton interaction in transition-metal dichalcogenide monolayers
• Quantum confined Stark effect in a MoS${}_2$ monolayer van der Waals heterostructure
• Electron-exciton interactions in the exciton-polaron problem
• Stark shift of excitons and trions in two-dimensional materials
• Thermal light emission from monolayer MoS2
• Distinctive signatures of the spin- and momentum-forbidden dark exciton states in the photo-luminescences of strained WSe${}_2$ monolayers under thermalization
• $k\cdot p$ theory for phosphorene: Effective g-factors, Landau levels, and excitons
• Field-induced dissociation of two-dimensional excitons in transition-metal dichalcogenides
• Optically Probing Tunable Band Topology in Atomic Monolayers
• Charged exciton kinetics in monolayer MoSe${}_2$ near ferroelectric domain walls in periodically poled LiNbO${}_3$
• A colloquium on the variational method applied to excitons in 2D materials
• Three-particle states and brightening of intervalley excitons in a doped MoS${}_2$ monolayer
• In-Plane Electric Field Induced Orbital Hybridization of Excitonic States In Monolayer WSe2
• Spectral measurement of the breakdown limit of $\beta -G{a}_2{O}_3$ and tunnel ionization of self-trapped excitons and holes
• Anisotropic Stark shift, field-induced dissociation, and electroabsorption of excitons in phosphorene
• Unusual spin properties of InP wurtzite nanowires revealed by Zeeman splitting spectroscopy
• Two-dimensional excitons in monolayer transition metal dichalcogenides from simple models and variational calculations
• Emergent bright excitons with Rashba spin-orbit coupling in atomic monolayers
• Unidirectional valley-contrasting photo-current in strained transition metal dichalcogenide monolayers
• Exciton dissociation in two-dimensional transition metal dichalcogenides: Excited states and substrate effects
• Dipolar and charged localized excitons in carbon nanotubes
• Wannier-Stark ladders and Stark shifts of excitons in Mott insulators
• Analytical Quantitative Semi-Classical Approach to the LoSurdo-Stark Effect and Ionization in 2D excitons
• Symmetry Classification for Alternating Excitons in Two-Dimensional Altermagnets
• Phonon-assisted Auger decay of excitons in doped transition metal dichalcogenide monolayers
• Tunable resonant s-p mixing of excitons in van der Waals heterostructures
• Room-Temperature Quantum-Confined Stark Effect in Atomically Thin Semiconductor
• Efficient ionization of two dimensional excitons by intense single cycle terahertz pulses
• Trion Engineered Multimodal Transistors in Two dimensional Bilayer Semiconductor Lateral Heterostructures