Coupled exciton internal and center-of-mass motions in two-dimensional semiconductors by a periodic electrostatic potential
arXiv:2402.13759 · doi:10.1103/PhysRevB.109.165422
Abstract
We theoretically investigated the coupling between the exciton internal and center-of-mass motions in monolayer transition metal dichalcogenides subjected to a periodic electrostatic potential. The coupling leads to the emergence of multiple absorption peaks in the exciton spectrum which are the hybridizations of 1s, 2s and 2p Rydberg states with different center-of-mass momentums. The energies and wave functions of hybrid states can be strongly modulated by varying the profile of the periodic electrostatic potential, which well reproduces the recent experimental observations. Combined with the electron-hole exchange interaction, non-degenerate valley-coherent bright excitons can be realized by applying an in-plane electric field, with the valley coherence determined by the field direction.
References in corpus (38)
- Control of valley polarization in monolayer MoS2 by optical helicity
- Valley polarization in MoS2 monolayers by optical pumping
- MoS_2 as an ideal material for valleytronics: valley-selective circular dichroism and valley Hall effect
- Exciton Binding Energy and Nonhydrogenic Rydberg Series in Monolayer WS2
- Excitons in atomically thin transition metal dichalcogenides
- Observation of giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
- Optical Spectrum of MoS: Many-body Effects and Diversity of Exciton States
- Optical Generation of Excitonic Valley Coherence in Monolayer WSe2
- Probing Excitonic Dark States in Single-layer Tungsten Disulfide
- Optical detection of Mott and generalized Wigner crystal states in WSe2/WS2 moiré superlattices
- Magic continuum in twisted bilayer WSe2
- Magnetic Control of Valley Pseudospin in Monolayer WSe2
- Valley Zeeman Effect in Elementary Optical Excitations of a Monolayer WSe2
- Breaking of valley degeneracy by magnetic field in monolayer MoSe2
- Abundance of correlated insulating states at fractional fillings of WSe/WS moiré superlattices
- Non-linear Optical Spectroscopy of Excited Exciton States for Efficient Valley Coherence Generation in WSe2 Monolayers
- Large-scale quantum-emitter arrays in atomically thin semiconductors
- Moiré excitons: from programmable quantum emitter arrays to spin-orbit coupled artificial lattices
- Valley-selective optical Stark effect in monolayer WS2
- Deterministic strain-induced arrays of quantum emitters in a two-dimensional semiconductor
- Direct imaging of the band profile in single layer on graphite: quasiparticle energy gap, metallic edge states and edge band bending
- Robust optical emission polarization in MoS2 monolayers through selective valley excitation
- Topological Exciton Bands in Moiré Heterojunctions
- Exciton Diamagnetic Shifts and Valley Zeeman Effects in Monolayer WS and MoS to 65 Tesla
- Valley excitons in two-dimensional semiconductors
- Ultrafast Generation of Pseudo-magnetic Field for Valley Excitons in WSe2 Monolayers
- Binding energies of exciton complexes in transition metal dichalcogenides and effect of dielectric environment
- Ultrafast Manipulation of Valley Pseudospin
- Control of Exciton Valley Coherence in Transition Metal Dichalcogenide Monolayers
- Quantum-Confined Electronic States arising from Moiré Pattern of MoS2-WSe2 Hetero-bilayers
- Direct measurement of key exciton properties: energy, dynamics and spatial distribution of the wave function
- Creation of moiré bands in a monolayer semiconductor by spatially periodic dielectric screening
- Universal superlattice potential for 2D materials from twisted interface inside h-BN substrate
- Nanoscale Conductivity Imaging of Correlated Electronic States in WSe2/WS2 Moiré Superlattices
- Localized interlayer complexes in heterobilayer transition metal dichalcogenides
- Observation of Rydberg moiré excitons
- In-Plane Electric Field Induced Orbital Hybridization of Excitonic States In Monolayer WSe2
- Inheritance of the exciton geometric structure from Bloch electrons in two-dimensional layered semiconductors