Electrostatic control of the trion fine structure in transition metal dichalcogenide monolayers

Abstract

Charged excitons (trions) are essential for the optical spectra in low dimensional doped monolayers (ML) of transitional metal dichalcogenides (TMDC). Using a direct diagonalization of the three-body Hamiltonian, we explore the low-lying trion states in four types of TMDC MLs. We show that the trions fine structure results from the interplay between the spin-valley fine structure of the single-particle bands and the exchange interaction between the composing particles. We demonstrate that by variations of the doping and dielectric environment, trion energy fine structure can be tuned, leading to anti-crossing of the bright and dark states with substantial implications for the optical spectra of TMDC MLs.

References in corpus (49)

• Atomically thin MoS2: A new direct-gap semiconductor
• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Observation of tightly bound trions in monolayer MoS2
• Excitons in atomically thin transition metal dichalcogenides
• Electrically Tunable Excitonic Light Emitting Diodes based on Monolayer WSe2 p-n Junctions
• Optical Spectrum of MoS${}_2$: Many-body Effects and Diversity of Exciton States
• Tunable Photoluminescence of Monolayer MoS2 via Chemical Doping
• k.p theory for two-dimensional transition metal dichalcogenide semiconductors
• Theory of Neutral and Charged Excitons in Monolayer Transition Metal Dichalcogenides
• Dielectric screening in two-dimensional insulators: Implications for excitonic and impurity states in graphane
• Bright excitons in monolayer transition metal dichalcogenides: from Dirac cones to Dirac saddle points
• Identification of excitons, trions and biexcitons in single-layer WS2
• Charged excitons in monolayer WSe${}_2$: experiment and theory
• Exciton fine structure and spin decoherence in monolayers of transition metal dichalcogenides
• Nonanalyticity, Valley Quantum Phases, and Light-like Exciton Dispersion in Monolayer TMDs: Theory and First-Principles Calculations
• Trion induced negative photoconductivity in monolayer MoS2
• Photoluminescence of freestanding single- and few-layer MoS2
• Absorption of Light by Excitons and Trions in Monolayers of Metal Dichalcogenide MoS${}_2$: Experiments and Theory
• Many-Body Theory of Trion Absorption Features in Two-Dimensional Semiconductors
• Trion Formation Dynamics in Monolayer Transition Metal Dichalcogenides
• Neutral and Charged Inter-Valley Biexcitons in Monolayer MoSe${}_2$
• Intervalley biexcitons and many-body effects in monolayer MoS2
• The dielectric impact of layer distances on exciton and trion binding energies in van der Waals heterostructures
• Proximity effects in bilayer graphene on monolayer WSe${}_2$: Field-effect spin-valley locking, spin-orbit valve, and spin transistor
• Strain-tunable orbital, spin-orbit, and optical properties of monolayer transition-metal dichalcogenides
• Excitonic valley effects in monolayer WS${}_2$ under high magnetic fields
• Environmentally-Sensitive Theory of Electronic and Optical Transitions in Atomically-Thin Semiconductors
• Diffusion quantum Monte Carlo study of excitonic complexes in two-dimensional transition-metal dichalcogenides
• Rigid band shifts in two-dimensional semiconductors through environmental screening
• 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
• Screened potential of a point charge in a thin film
• Spin-Valley Locking Effect in Defect States of Monolayer MoS${}_2$
• Singlet and triplet trions in WS${}_2$ monolayer encapsulated in hexagonal boron nitride
• Ultrafast dynamics in monolayer TMDCs: the interplay of dark excitons, phonons and intervalley Coulomb exchange
• Room temperature observation of biexcitons in exfoliated WS2 monolayers
• Dynamics and Spin-Valley Locking Effects in Monolayer Transition Metal Dichalcogenides
• Temperature Renormalization of Optical Spectra of Monolayer MoS2
• Many-Body Simulation of Two-Dimensional Electronic Spectroscopy of Excitons and Trions in Monolayer Transition-Metal Dichalcogenides
• Dark trions govern the temperature-dependent optical absorption and emission of doped atomically thin semiconductors
• Three-particle correlation from a Many-Body Perspective: Trions in a Carbon Nanotube
• Dark trions and biexcitons in WS2 and WSe2 made bright by e-e scattering
• Excitonic complexes in $n$-doped WS${}_2$ monolayer
• Trion induced photoluminescence of a doped MoS2 monolayer
• Exposing the trion's fine structure by controlling the carrier concentration in hBN-encapsulated MoS${}_2$
• Controlling exciton many-body states by the electric-field effect in monolayer MoS${}_2$
• Three-particle states and brightening of intervalley excitons in a doped MoS${}_2$ monolayer
• Variationally optimized orbital approach to trions in two-dimensional materials
• Light-matter coupling and non-equilibrium dynamics of exchange-split trions in monolayer WS2

Cited by in corpus (3)

• Strain control of exciton and trion spin-valley dynamics in monolayer transition metal dichalcogenides
• Microscopic theory of exciton and trion polaritons in doped monolayers of transition metal dichalcogenides
• Photonics in Flatland: Challenges and Opportunities for Nanophotonics with 2D Semiconductors