Theory of interlayer exciton dynamics in 2D TMDCs Heterolayers under the influence of strain reconstruction and disorder
arXiv:2312.14054 · doi:10.1103/PhysRevB.109.125308
Abstract
Monolayers of transition metal dichalcogenides (TMDC) became one of the most studied nanostructures in the last decade. Combining two different TMDC monolayers results in a heterostructure whose properties can be individually tuned by the twist angle between the lattices of the two van-der-Waals layers and the relative placement of the layers, leading to Moiré cells. For small twist angles, lattice reconstruction leads to strong strain fields in the Moiré cells. In this paper, we combine an existing theory for lattice reconstruction with a quantum dynamic theory for interlayer excitons and their dynamics due to exciton phonon scattering using a polaron transformation. The exciton theory is formulated in real space instead of the commonly used quasi-momentum space to account for imperfections in the heterolayer breaking lattice translational symmetry. We can analyze the structure of the localized and delocalized exciton states and their exciton-phonon scattering rates for single phonon processes using Born-Markov approximation and multi-phonon processes using a polaron transformation. Furthermore, linear optical spectra and exciton relaxation Green functions are calculated and discussed. A P-stacked MoSe/WSe heterolayer is used as an illustrative example. It shows excitons localized in the potential generated through the Moiré-pattern and strain and a delocalized continuum. The exciton-phonon relaxation times vary depending on the strain and range from sub-pico seconds up to nanoseconds.
References in corpus (46)
- Electric Field Effect in Atomically Thin Carbon Films
- Graphene: Status and Prospects
- Two Dimensional Atomic Crystals
- Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
- Control of valley polarization in monolayer MoS2 by optical helicity
- Moiré Excitons in Van der Waals Heterostructures
- Low-temperature photocarrier dynamics in monolayer MoS2
- Dielectric screening in two-dimensional insulators: Implications for excitonic and impurity states in graphane
- Intrinsic Exciton Linewidth in Monolayer Transition Metal Dichalcogenides
- First direct observation of a nearly ideal graphene band structure
- Intrinsic Transport Properties of Electrons and Holes in Monolayer Transition Metal Dichalcogenides
- Robust optical emission polarization in MoS2 monolayers through selective valley excitation
- Theory of optical absorption by interlayer excitons in transition metal dichalcogenide heterobilayers
- Photovoltaic and photothermoelectric effect in a double-gated WSe2 device
- Trion Formation Dynamics in Monolayer Transition Metal Dichalcogenides
- Analytical approach to excitonic properties of MoS2
- Neutral and Charged Inter-Valley Biexcitons in Monolayer MoSe
- Quantum Dot Cavity-QED in the Presence of Strong Electron-Phonon Interactions
- Stacking domains and dislocation networks in marginally twisted bilayers of transition metal dichalcogenides
- Direct Band Gaps in Group IV-VI Monolayer Materials: Binary Counterparts of Phosphorene
- Interlayer exciton dynamics in a dichalcogenide monolayer heterostructure
- Shubnikov-de Haas oscillations of high mobility holes in monolayer and bilayer WSe: Landau level degeneracy, effective mass, and negative compressibility
- The dielectric impact of layer distances on exciton and trion binding energies in van der Waals heterostructures
- Direct exciton emission from atomically thin transition metal dichalcogenide heterostructures near the lifetime limit
- Exciton-phonon coupling in MoSe2 monolayers
- Excitonic Photoluminescence in Semiconductor Quantum Wells: Plasma versus Excitons
- Diffusion quantum Monte Carlo study of excitonic complexes in two-dimensional transition-metal dichalcogenides
- Excitons in mesoscopically reconstructed moiré heterostructures
- Theory of the quantum-dot Mollow triplet in an exciton-driven semiconductor cavity
- Impact of strain on the excitonic linewidth in transition metal dichalcogenides
- Valley Trion Dynamics in Monolayer MoSe
- Piezoelectric networks and ferroelectric moiré superlattice domains in twistronic WS/MoS and WSe/MoSe bilayers
- Prospects and limitations of transition-metal dichalcogenide laser gain materials
- Theory of tunable flux lattices in the homobilayer moiré of twisted and uniformly strained transition metal dichalcogenides
- Polaron master equation theory of pulse driven phonon-assisted population inversion and single photon emission from quantum dot excitons
- Theory of absorption lineshape in monolayers of transition metal dichalcogenides
- Theory of moiré localized excitons in transition-metal dichalcogenide heterobilayers
- Anisotropic properties of monolayer 2D materials: an overview from the C2DB database
- Exciton-phonon-scattering: A competition between bosonic and fermionic nature of bound electron-hole pairs
- Layer pseudospin dynamics and genuine non-Abelian Berry phase in inhomogeneously strained moiré pattern
- Twirling and spontaneous symmetry breaking of domain wall networks in lattice-reconstructed heterostructures of 2D materials
- Self-organised quantum dots in marginally twisted MoSe/WSe and MoS/WS bilayers
- Combined tensor network/cluster expansion method using logic gates: Illustrated for (bi-)excitons by a single layer MoS model system
- Tensor network strategies for calculating biexcitons and trions in monolayer 2D materials beyond the ground state
- Impact of optically pumped non-equilibrium steady states on luminescence emission of atomically-thin semiconductor excitons
- Bichromatic four-wave mixing and quadrature-squeezing from biexcitons in atomically thin semiconductor microcavities