Analytical approach to excitonic properties of MoS2

Abstract

We present an analytical investigation of the optical absorption spectrum of monolayer molybdenumdisulfide. Based on the density matrix formalism, our approach gives insights into the microscopic origin of excitonic transitions, their relative oscillator strength, and binding energy. We show analytical expressions for the carrier-light coupling element, which contains the optical selection rules and well describes the valleyselective polarization in MoS2. In agreement with experimental results, we find the formation of strongly bound electron-hole pairs due to the efficient Coulomb interaction. The absorption spectrum of MoS2 on a silicon substrate features two pronounced peaks at 1.91 eV and 2.05 eV corresponding to the A and B exciton, which are characterized by binding energies of 420 meV and 440 meV, respectively. Our calculations reveal their relative oscillator strength and predict the appearance of further low-intensity excitonic transitions at higher energies. The presented approach is applicable to other transition metal dichalcogenides and can be extended to investigations of trion and biexcitonic effects.

References in corpus (8)

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• Valley polarization in MoS2 monolayers by optical pumping
• Optical Spectrum of MoS${}_2$: Many-body Effects and Diversity of Exciton States
• Valley Dependent Optoelectronics from Inversion Symmetry Breaking
• Robust optical emission polarization in MoS2 monolayers through selective valley excitation
• Photoluminescence of freestanding single- and few-layer MoS2
• Intervalley Scattering and Localization Behaviors of Spin-Valley Coupled Dirac Fermions
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Cited by in corpus (103)

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• Tightly bound excitons in monolayer WSe2
• k.p theory for two-dimensional transition metal dichalcogenide semiconductors
• Breaking of valley degeneracy by magnetic field in monolayer MoSe2
• Excitonic linewidth and coherence lifetime in monolayer transition metal dichalcogenides
• Valley Splitting and Polarization by the Zeeman Effect in Monolayer MoSe2
• Identification of excitons, trions and biexcitons in single-layer WS2
• Binding energies of exciton complexes in transition metal dichalcogenides and effect of dielectric environment
• Vibrational and optical properties of MoS${}_2$: from monolayer to bulk
• Dark excitons in transition metal dichalcogenides
• Excitons versus electron-hole plasma in monolayer transition metal dichalcogenide semiconductors
• Generation and evolution of spin-, valley- and layer-polarized excited carriers in inversion-symmetric WSe2
• Phonon Sidebands in Transition Metal Dichalcogenides
• The dielectric impact of layer distances on exciton and trion binding energies in van der Waals heterostructures
• The Coulomb interaction in monolayer transition-metal dichalcogenides
• The Effect of Preparation Conditions on Raman and Photoluminescence of Monolayer WS2
• Spin and valley dynamics of excitons in transition metal dichalcogenides monolayers
• Berry phase modification to the energy spectrum of excitons
• Theory of Exciton-Phonon Coupling
• Environmentally-Sensitive Theory of Electronic and Optical Transitions in Atomically-Thin Semiconductors
• Exciton Relaxation Cascade in Two-dimensional Transition-metal dichalcogenides
• Binding energies of trions and biexcitons in two-dimensional semiconductors from diffusion quantum Monte Carlo calculations
• The role of momentum-dark excitons in the elementary optical response of bilayer WSe${}_2$
• Binding energies and spatial structures of small carrier complexes in monolayer transition metal dichalcogenides via diffusion Monte Carlo
• Three-particle Complexes in Two-Dimensional Semiconductors
• Newly observed first-order resonant Raman modes in few-layer MoS${}_2$
• Optically discriminating carrier-induced quasiparticle band gap and exciton energy renormalization in monolayer MoS2
• High-temperature superfuidity of the two-component Bose gas in a TMDC bilayer
• Fast Exciton Annihilation by Capture of Electrons or Holes by Defects via Auger Scattering in Monolayer Metal Dichalcogenides
• Moiré excitons in MoSe${}_2$-WSe${}_2$ heterobilayers and heterotrilayers
• Monitoring in real time the photon-dressing and undressing of quasiparticles from first principles time-resolved photoelectron spectroscopy
• Bright and dark singlet excitons via linear and two-photon spectroscopy in monolayer transition-metal dichalcogenides
• Impact of strain on the excitonic linewidth in transition metal dichalcogenides
• Room temperature observation of biexcitons in exfoliated WS2 monolayers
• Intrinsic Lifetime of Higher Excitonic States in Tungsten Diselenide Monolayers
• Intrinsic exciton states mixing and non-linear optical properties in transition metal dichalcogenide monolayers
• Magneto-photoluminescence of exciton Rydberg states in monolayer WSe${}_2$
• Excitons and trions in monolayer transition metal dichalcogenides: A comparative study between the multiband model and the quadratic single-band model
• Impact of strain on the optical fingerprint of monolayer transition metal dichalcogenides
• Dynamical screening in monolayer transition-metal dichalcogenides and its manifestations in the exciton spectrum
• Mapping of the dark exciton landscape in transition metal dichalcogenides
• Light-Matter Interactions in Two-Dimensional Transition Metal Dichalcogenides: Dominant Excitonic Transitions in mono- and few-layer MoX${}_2$ and Band Nesting
• Excitonic effects in the optical properties of 2D materials: An equation of motion approach
• Excitonic structure of the optical conductivity in MoS${}_2$ monolayers
• Excitonic effects in two-dimensional semiconductors: Path integral Monte Carlo approach
• Excitons, trions, and biexcitons in transition metal dichalcogenides: magnetic field dependence
• Valley qubit in gated MoS${}_2$ monolayer quantum dot
• Moiré-Bose-Hubbard model for interlayer excitons in twisted transition metal dichalcogenide heterostructures
• Nonlinear optical selection rules of excitons in monolayer transition metal dichalcogenides
• Dielectric Engineering of Electronic Correlations in a van der Waals Heterostructure
• Optical Absorption by Dirac Excitons in Single-Layer Transition-Metal Dichalcogenides
• Ultrafast nonequilibrium evolution of excitonic modes in semiconductors
• Model Prediction of Self-Rotating Excitons in Two-Dimensional Transition-Metal Dichalcogenides
• Theory of optically induced Förster Coupling in van der Waals coupled Heterostuctures
• Exciton formation assisted by longitudinal optical phonons in monolayer transition metal dichalcogenides
• Microscopic picture of electron-phonon interaction in two-dimensional halide perovskites
• Theory of absorption lineshape in monolayers of transition metal dichalcogenides
• Brightening of spin- and momentum-dark excitons in transition metal dichalcogenides
• Exciton-polaritons in transition-metal dichalcogenides and their direct excitation via energy transfer
• Dark exciton-exciton annihilation in monolayer WSe${}_2$
• Quenching of Intervalley Exchange Coupling in the Presence of Momentum-Dark States in TMDCs
• Strong Valley Zeeman Effect of Dark Excitons in Monolayer Transition Metal Dichalcogenides in a Tilted Magnetic Field
• Dark-exciton based strain sensing in transition metal dichalcogenides
• Theoretical methods for excitonic physics in two-dimensional materials
• Optical fingerprint of dark 2p-states in transition metal dichalcogenides
• Exciton-phonon-scattering: A competition between bosonic and fermionic nature of bound electron-hole pairs
• Generalized scaling law for exciton binding energy in two-dimensional materials
• Exciton routing in the heterostructure of TMD and paraelectrics
• Analytical description of the 1s exciton linewidth temperature-dependence in transition metal dichalcogenides
• Impact of dark excitons on Förster type resonant energy transfer between dye molecules and atomically thin semiconductors
• Optical spin pumping induced pseudo-magnetic field in two dimensional heterostructures
• Microscopic modelling of exciton-polariton diffusion coefficients in atomically thin semiconductors
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• Berry Curvature Signatures in Chiroptical Excitonic Transitions
• Attractive Coulomb interaction of 2D Rydberg excitons
• Phonon-assisted Exciton Dissociation in Transition Metal Dichalcogenides
• Combined tensor network/cluster expansion method using logic gates: Illustrated for (bi-)excitons by a single layer MoS${}_2$ model system
• Tightly bound excitons in two-dimensional semiconductors with a flat valence band
• Excited-State Trions in Two Dimensional Materials
• Optical fingerprint of bright and dark localized excitonic states in atomically thin 2D materials
• Interlayer excitonic spectra of vertically stacked MoSe${}_2$/WSe${}_2$ heterobilayers
• Spatial control of carrier capture in two-dimensional materials: Beyond energy selection rules
• Tensor network strategies for calculating biexcitons and trions in monolayer 2D materials beyond the ground state
• Comparative study of the binding energy in a thin and ultra-thin organic-inorganic perovskite within dielectric mismatches effects
• Triangular lattice exciton model
• Large conduction band and Fermi velocity spin splittings due to Coulomb interactions in single-layer MoS_{2}
• Signatures of dark excitons in exciton-polariton optics of transition metal dichalcogenides
• Optical fingerprint of non-covalently functionalized transition metal dichalcogenides
• Impact of optically pumped non-equilibrium steady states on luminescence emission of atomically-thin semiconductor excitons
• Coulomb effects in the absorbance spectra of two-dimensional Dirac materials
• Modelling excitonic Mott transitions in two-dimensional semiconductors
• Molecule signatures in photoluminescence spectra of transition metal dichalcogenides
• Photoexcitation of planar Wannier excitons by twisted photons
• Laser-field detuning assisted optimization of exciton valley dynamics in monolayer WSe${}_2$: Geometric quantum speed limit
• Fermionic vs. bosonic thermalization in the phonon-driven exciton dynamics: An analytic dimensionality study
• Theory of interlayer exciton dynamics in 2D TMDCs Heterolayers under the influence of strain reconstruction and disorder
• Polariton transport in 2D semiconductors: Phonon-mediated transitions between ballistic, superdiffusive and exciton-limited regimes
• Theory of phonon sidebands in the absorption spectra of moiré exciton-polaritons
• Direct observation of internal quantum transitions and femtosecond radiative decay of excitons in monolayer WSe_2
• Ferroelectric driven exciton and trion modulation in monolayer MoSe2 and WSe2
• Universal absorption of two-dimensional systems
• Suppression and amplification of phonon sidebands in transition metal dichalcogenides by optical feedback