Optical properties of charged excitons in two-dimensional semiconductors

Abstract

Strong Coulomb interaction in atomically-thin transition metal dichalcogenides makes these systems particularly promising for studies of excitonic physics. Of special interest are the manifestations of the charged excitons, also known as trions, in the optical properties of two-dimensional semiconductors. In order to describe the optical response of such a system, the exciton interaction with resident electrons should be explicitly taken into account. In this paper we demonstrate that this can be done both in the trion (essentially, few-particle) and Fermi-polaron (many-body) approaches, which produce equivalent results provided that the electron density is sufficiently low and the trion binding energy is much smaller than the exciton one. Here we consider the oscillator strengths of the optical transitions related to the charged excitons, fine structure of trions and Zeeman effect, as well as photoluminescence of trions illustrating the applicability of both few-particles and many-body models.

15 pages, 5 figures; For The Journal of Chemical Physics Special Topic Issue on Two-Dimensional Materials

References in corpus (12)

• k.p theory for two-dimensional transition metal dichalcogenide semiconductors
• Valley Zeeman Effect in Elementary Optical Excitations of a Monolayer WSe2
• Breaking of valley degeneracy by magnetic field in monolayer MoSe2
• Attractive and repulsive Fermi polarons in two dimensions
• Many-Body Theory of Trion Absorption Features in Two-Dimensional Semiconductors
• Magneto-optics in transition metal diselenide monolayers
• Three-particle Complexes in Two-Dimensional Semiconductors
• Exciton g-factors in monolayer and bilayer WSe${}_2$ from experiment and theory
• Many-body theory of optical absorption in doped two-dimensional semiconductors
• Microscopic model of the doping dependence of line widths in monolayer transition metal dichalcogenides
• Light-matter coupling and non-equilibrium dynamics of exchange-split trions in monolayer WS2
• Trion ground state energy: simple results

Cited by in corpus (61)

• Electron-exciton interactions in the exciton-polaron problem
• Roadmap for Photonics with 2D Materials
• Measurement of Conduction and Valence Bands g-factors in a Transition Metal Dichalcogenide Monolayer
• Exciton-polaron interactions in monolayer WS${}_2$
• Doping-control of excitons and magnetism in few-layer CrSBr
• Hexcitons and oxcitons in monolayer WSe${}_2$
• 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
• Giant effective Zeeman splitting in a monolayer semiconductor realized by spin-selective strong light-matter coupling
• Autoionization and dressing of excited excitons by free carriers in monolayer WSe2
• Quantum Dynamics of Attractive and Repulsive Polarons in a Doped MoSe${}_2$ Monolayer
• Attractive and repulsive exciton-polariton interactions mediated by an electron gas
• Controlling exciton many-body states by the electric-field effect in monolayer MoS${}_2$
• Electron recoil effect in electrically tunable MoSe2 monolayers
• Spontaneous valley polarization of interacting carriers in a monolayer semiconductor
• Tunable Feshbach resonances and their spectral signatures in bilayer semiconductors
• Many-body exciton and inter-valley correlations in heavily electron-doped WSe${}_2$ monolayers
• Interactions mediated by atoms, photons, electrons, and excitons
• Direct Measurement of Biexcitons in Monolayer WS2
• Monolayer WS${}_2$ electro- and photo-luminescence enhancement by TFSI treatment
• Enhanced scattering between electrons and exciton-polaritons in a microcavity
• Trion photoluminescence and trion stability in atomically thin semiconductors
• Microscopic theory of exciton and trion polaritons in doped monolayers of transition metal dichalcogenides
• Composite excitonic states in doped semiconductors
• Crossover from exciton polarons to trions in doped two-dimensional semiconductors at finite temperature
• Confined Trions and Mott-Wigner States in a Purely Electrostatic Moiré Potential
• The Structure and Dispersion of Exciton-Trion-Polaritons in Two-Dimensional Materials: Experiments and Theory
• Effect of fermion indistinguishability on optical absorption of doped two-dimensional semiconductors
• Emergence of 6-particle "hexciton'' states in WS${}_2$ and MoSe${}_2$ monolayers
• Excitonic theory of doping-dependent optical response in atomically thin semiconductors
• Optical detection of long electron spin transport lengths in a monolayer semiconductor
• Excitons and trions in monolayer semiconductors with correlated electrons
• Influence of direct deposition of dielectric materials on the optical response of monolayer WS${}_2$
• Interplay of valley polarized dark trion and dark exciton-polaron in monolayer WSe2
• Polaritons in an electron gas -- quasiparticles and Landau effective interactions
• Nonlinear optical response of resonantly driven polaron-polaritons
• Nonclassical Light from Exciton Interactions in a Two-Dimensional Quantum Mirror
• Spin-valley relaxation dynamics of Landau-quantized electrons in MoSe${}_2$ monolayer
• MoS${}_2$ flake as a van der Waals homostructure: luminescence properties and optical anisotropy
• Theory of single and double electron spin-flip Raman scattering in semiconductor nanoplatelets
• Exact Quantum Virial Expansion for the Optical Response of Doped Two-Dimensional Semiconductors
• Trion formation resolves observed peak shifts in the optical spectra of transition metal dichalcogenides
• Valley-mediated singlet- and triplet-polaron interactions and quantum dynamics in a doped WSe${}_2$ monolayer
• Effect of intravalley and intervalley electron-hole exchange on the nonlinear optical response of monolayer MoSe${}_2$
• Longitudinal-transverse splitting and fine structure of Fermi polarons in two-dimensional semiconductors
• Excitons and trions in CrSBr bilayers
• Excitons in periodic potentials
• Modelling excitonic Mott transitions in two-dimensional semiconductors
• Magneto-Optical Measurements of the Negatively Charged 2$s$ Exciton in WSe${}_2$
• Doping-induced non-Markovian interference causes excitonic linewidth broadening in monolayer WSe${}_2$
• Component exchange theory of trions
• Spin/Valley pumping of resident electrons in WSe2 and WS2 monolayers
• Charged excitons or trions in 2D parabolic quantum dots?
• Interlayer Fermi polarons of excited exciton states in quantizing magnetic fields
• AC-Stark Spectroscopy of Interactions between Moiré Excitons and Polarons
• Valley polarization of trions in monolayer MoSe${}_2$ interfaced with bismuth iron garnet
• Spin-conserving Boltzmann theory for carriers and excitons in organic semiconductors
• Excitonic Bose-polarons in electron-hole bilayers
• Terahertz radiation induced attractive-repulsive Fermi polaron conversion in transition metal dichalcogenide monolayers
• Room-temperature tuning and probing of Fermi polarons in atomically thin semiconductors on a plasmonic metasurface
• Trion-phonon interaction in atomically thin semiconductors