The Coulomb interaction in monolayer transition-metal dichalcogenides

Abstract

Recently, the celebrated Keldysh potential has been widely used to describe the Coulomb interaction of few-body complexes in monolayer transition-metal dichalcogenides. Using this potential to model charged excitons (trions), one finds a strong dependence of the binding energy on whether the monolayer is suspended in air, supported on SiO${}_2$, or encapsulated in hexagonal boron-nitride. However, empirical values of the trion binding energies show weak dependence on the monolayer configuration. This deficiency indicates that the description of the Coulomb potential is still lacking in this important class of materials. We address this problem and derive a new potential form, which takes into account the three atomic sheets that compose a monolayer of transition-metal dichalcogenides. The new potential self-consistently supports (i) the non-hydrogenic Rydberg series of neutral excitons, and (ii) the weak dependence of the trion binding energy on the environment. Furthermore, we identify an important trion-lattice coupling due to the phonon cloud in the vicinity of charged complexes. Neutral excitons, on the other hand, have weaker coupling to the lattice due to the confluence of their charge neutrality and small Bohr radius.

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Cited by in corpus (69)

• Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields
• Theory of exciton-electron scattering in atomically thin semiconductors
• Multipath optical recombination of intervalley dark excitons and trions in monolayer WSe${}_2$
• Magneto-photoluminescence of exciton Rydberg states in monolayer WSe${}_2$
• Dynamical screening in monolayer transition-metal dichalcogenides and its manifestations in the exciton spectrum
• Measurement of Conduction and Valence Bands g-factors in a Transition Metal Dichalcogenide Monolayer
• Dependence of the hBN Layer Thickness on the Band Structure and Exciton Properties of Encapsulated WSe2 Monolayers
• Stark shift of excitons and trions in two-dimensional materials
• Hexcitons and oxcitons in monolayer WSe${}_2$
• Moiré-Bose-Hubbard model for interlayer excitons in twisted transition metal dichalcogenide heterostructures
• 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
• Localized Excitons in NbSe${}_2$-MoSe${}_2$ Heterostructures
• Virtual trions in the photoluminescence of monolayer transition-metal dichalcogenides
• Exciton valley depolarization in monolayer transition-metal dichalcogenides
• Trion induced photoluminescence of a doped MoS2 monolayer
• Radiative lifetime of localized excitons in transition metal dichalcogenides
• Few-body systems in condensed matter physics
• Charge transfer and asymmetric coupling of MoSe${}_2$ valleys to the magnetic order of CrSBr
• Finite-temperature plasmons, damping and collective behavior for $\alpha -{\mathcal{T}}_3$ model
• Anomalous Stark Shift of Excitonic Complexes in Monolayer Semiconductor
• Optical Properties of Anisotropic Excitons in Phosphorene
• Valley two-qubit system in a MoS${}_2$-monolayer gated double quantum dot
• Phonon-assisted exciton and trion conversion efficiency in transition metal Dichalcogenides
• Breakdown of the static dielectric screening approximation of Coulomb interactions in atomically thin semiconductors
• Observation of ~100% valley-coherent excitons in monolayer MoS2 through giant enhancement of valley coherence time
• A colloquium on the variational method applied to excitons in 2D materials
• Charged exctions in two-dimensional transition-metal dichalcogenides - semiclassical calculation of Berry-curvature effects
• Three-particle states and brightening of intervalley excitons in a doped MoS${}_2$ monolayer
• A Quantum Impurity Model for Anyons
• Magnetoexcitons in transition-metal dichalcogenides monolayers, bilayers, and van der Waals heterostructures
• Composite excitonic states in doped semiconductors
• Optical properties of exciton in two-dimensional transition metal dichalcogenide nanobubbles
• Exciton spectrum in atomically thin monolayers: The role of hBN encapsulation
• Impacts of dielectric screening on the luminescence of monolayer WSe${}_2$
• Dynamical exciton condensates in biased electron-hole bilayers
• Excited-State Trions in Two Dimensional Materials
• Valley and spin polarized broken symmetry states of interacting electrons in gated MoS${}_2$ quantum dots
• Excitons and trions in monolayer semiconductors with correlated electrons
• Extremely imbalanced two-dimensional electron-hole-photon systems
• Excitons without effective mass: biased bilayer graphene
• Intervalley electron-hole exchange interaction and impurity-assisted recombination of indirect excitons in WS${}_2$ and WSe${}_2$ monolayers
• Effects of dynamical dielectric screening on the excitonic spectrum of monolayer semiconductors
• Charge-dipole and dipole-dipole interactions in two-dimensional materials
• Doped Mott phase and charge correlations in monolayer 1T-NbSe${}_2$
• Twist-tuned quantum criticality in moiré bilayer graphene
• Effect of intravalley and intervalley electron-hole exchange on the nonlinear optical response of monolayer MoSe${}_2$
• Advancing excited-state properties of two-dimensional materials using a dielectric-dependent hybrid functional
• Excitonic Tonks-Girardeau and charge-density wave phases in monolayer semiconductors
• Imaging Seebeck drift of excitons and trions in MoSe2 monolayers
• Trion ground state energy: simple results
• Excitons and trions with negative effective masses in two-dimensional semiconductors
• Thermal effect on magnetoexciton energy spectra in monolayer transition metal dichalcogenides
• Ten-valley excitonic complexes in charge-tunable monolayer WSe${}_2$
• Dynamic polarizability of low-dimensional excitons
• Modelling excitonic Mott transitions in two-dimensional semiconductors
• Rydberg excitons and polaritons in monolayer transition metal dichalcogenides in a magnetic field
• Excitons and trions in CrSBr bilayers
• Component exchange theory of trions
• Probing the fractional quantum Hall phases in valley-layer locked bilayer MoS${}_2$
• Charge-separated electron-hole liquid in transition metal dichalcogenide heterostructures
• Landau-level composition of bound exciton states in magnetic field
• Energy shifts and broadening of excitonic resonances in electrostatically-doped semiconductors
• Disorder of Excitons and Trions in Monolayer MoSe2
• Quasi-equilibrium polariton condensates in the non-linear regime and beyond
• Two-dimensional bound excitons in real space and Landau quantization space: A comparative study
• Trion-phonon interaction in atomically thin semiconductors
• Exciton localization on p-i-n junctions in two-dimensional crystals
• Long-living excited states of a 2D diamagnetic exciton