Exciton fine structure splitting and linearly polarized emission in strained transition-metal dichalcogenide monolayers
arXiv:2206.13847 · doi:10.1103/PhysRevB.106.125303
Abstract
We study theoretically effects of an anisotropic elastic strain on the exciton energy spectrum fine structure and optical selection rules in atom-thin crystals based on transition-metal dichalcogenides. The presence of strain breaks the chiral selection rules at the -points of the Brillouin zone and makes optical transitions linearly polarized. The orientation of the induced linear polarization is related to the main axes of the strain tensor. Elastic strain provides an additive contribution to the exciton fine structure splitting in agreement with experimental evidence obtained from uniaxially strained WSe monolayer. The applied strain also induces momentum-dependent Zeeman splitting. Depending on the strain orientation and magnitude, Dirac points with a linear dispersion can be formed in the exciton energy spectrum. We provide a symmetry analysis of the strain effects and develop a microscopic theory for all relevant strain-induced contributions to the exciton fine structure Hamiltonian.
arXiv comment12 pages, 5 figures
References in corpus (51)
- Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
- Control of valley polarization in monolayer MoS2 by optical helicity
- Valley polarization in MoS2 monolayers by optical pumping
- Excitons in atomically thin transition metal dichalcogenides
- Optical Generation of Excitonic Valley Coherence in Monolayer WSe2
- Moiré Excitons in Van der Waals Heterostructures
- Local strain engineering in atomically thin MoS2
- First-principles study of the phonon-limited mobility in n-type single-layer MoS2
- Signatures of moiré-trapped valley excitons in MoSe/WSe heterobilayers
- Observation of Moiré Excitons in WSe2/WS2 Heterostructure Superlattices
- k.p theory for two-dimensional transition metal dichalcogenide semiconductors
- Resonantly hybridised excitons in moiré superlattices in van der Waals heterostructures
- Exciton-polariton topological insulator
- Excitonic linewidth and coherence lifetime in monolayer transition metal dichalcogenides
- Strain tuning of optical emission energy and polarization in monolayer and bilayer MoS2
- Intrinsic Transport Properties of Electrons and Holes in Monolayer Transition Metal Dichalcogenides
- Robust optical emission polarization in MoS2 monolayers through selective valley excitation
- In-plane Propagation of Light in Transition Metal Dichalcogenide Monolayers: Optical Selection Rules
- Orbital mechanisms of electron spin manipulation by an electric field
- Bright excitons in monolayer transition metal dichalcogenides: from Dirac cones to Dirac saddle points
- Valley depolarization due to inter- and intra-valley electron-hole exchange interactions in monolayer MoS
- Exciton fine structure and spin decoherence in monolayers of transition metal dichalcogenides
- Exciton Valley Dynamics probed by Kerr Rotation in WSe2 Monolayers
- Polariton Topological Insulator
- One-Dimensional Moiré Excitons in Transition-Metal Dichalcogenide Heterobilayers
- Transport Theory of Monolayer Transition-Metal Dichalcogenides through Symmetry
- Control of biaxial strain in single-layer Molybdenite using local thermal expansion of the substrate
- Control of Exciton Valley Coherence in Transition Metal Dichalcogenide Monolayers
- Theory of strain in single-layer transition metal dichalcogenides
- Phonon Sidebands in Transition Metal Dichalcogenides
- Control of the Exciton Radiative Lifetime in van der Waals Heterostructures
- Strain-tunable orbital, spin-orbit, and optical properties of monolayer transition-metal dichalcogenides
- Exciton-phonon coupling in MoSe2 monolayers
- Spin and valley dynamics of excitons in transition metal dichalcogenides monolayers
- Optical valley Hall effect for highly valley-coherent exciton-polaritons in an atomically thin semiconductor
- Dynamic exciton funneling by local strain control in a monolayer semiconductor
- Impact of strain on the excitonic linewidth in transition metal dichalcogenides
- Intrinsic exciton states mixing and non-linear optical properties in transition metal dichalcogenide monolayers
- Optomechanical measurement of thermal transport in two-dimensional MoSe2 lattices
- Strain-dependent exciton diffusion in transition metal dichalcogenides
- Exciton valley depolarization in monolayer transition-metal dichalcogenides
- Tunable exciton-optomechanical coupling in suspended monolayer MoSe2
- Theory of Strain-Induced Confinement in Transition Metal Dichalcogenide Monolayers
- Exciton-phonon relaxation bottleneck and radiative decay of thermal exciton reservoir in two-dimensional materials
- Exciton fine-structure splitting of telecom wavelength single quantum dots: statistics and external strain tuning
- Skew Scattering and Side Jump Drive Exciton Valley Hall Effect in Two-Dimensional Crystals
- Measurement of local optomechanical properties of a direct bandgap 2D semiconductor
- Control of the exciton valley dynamics in van der Waals heterostructures
- Optical properties of exciton in two-dimensional transition metal dichalcogenide nanobubbles
- Nonlinear exciton drift in piezoelectric two-dimensional materials
- Flexural deformations and collapse of bilayer two-dimensional crystals by interlayer exciton
Cited by in corpus (13)
- Photoluminescence imaging of single photon emitters within nanoscale strain profiles in monolayer WSe
- Strain control of exciton and trion spin-valley dynamics in monolayer transition metal dichalcogenides
- Creation and Microscopic Origins of Single-Photon Emitters in Transition Metal Dichalcogenides and Hexagonal Boron Nitride
- Self-Induced Valley Bosonic Stimulation of Exciton-Polaritons in a Monolayer Semiconductor
- High-purity and stable single-photon emission in bilayer WSe via phonon-assisted excitation
- Longitudinal-transverse splitting and fine structure of Fermi polarons in two-dimensional semiconductors
- Biaxial strain tuning of exciton energy and polarization in monolayer WS2
- Coherent spin dynamics of excitons in strained monolayer semiconductors
- Signatures of valley drift in the diversified band dispersions of bright, gray, and dark excitons in MoS2 monolayers under uni-axial strains
- Controllable fusion of electromagnetic bosons in two-dimensional semiconductors
- Quantum valley pseudospin controlled by strain
- Effects of Strain-Induced Pseudogauge Fields on Exciton Dispersion, Transport, and Interactions in Transition Metal Dichalcogenides Nanoribbons
- Excitonic optical absorption in strained monolayer CrSBr