Localized interlayer complexes in heterobilayer transition metal dichalcogenides

Abstract

We present theoretical results for the radiative rates and doping-dependent photoluminescence spectrum of interlayer excitonic complexes localized by donor impurities in MoSe${}_2$/WSe${}_2$ twisted heterobilayers, supported by quantum Monte Carlo calculations of binding energies and wave-function overlap integrals. For closely aligned layers, radiative decay is made possible by the momentum spread of the localized complexes' wave functions, resulting in few $\mu$s${}^{-1}$ radiative rates. For strongly misaligned layers, the short-range interaction between the carriers and impurity provides a finite radiative rate with a strong asymptotic twist angle dependence $\propto {\theta }^{-8}$. Finally, phonon-assisted recombination is considered, with emission of optical phonons in both layers resulting in additional weaker emission lines, redshifted by the phonon energy.

arXiv comment19 pages, including 11 figures and 5 appendices

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Cited by in corpus (33)

• Resonantly hybridised excitons in moiré superlattices in van der Waals heterostructures
• Twist Angle Dependent Interlayer Exciton Lifetimes in van der Waals Heterostructures
• Interlayer hybridization and moiré superlattice minibands for electrons and excitons in heterobilayers of transition-metal dichalcogenides
• Variational and Diffusion Quantum Monte Carlo Calculations with the CASINO Code
• Generalized Wigner crystallization in moiré materials
• Collective Excitations in 2D Materials
• Piezoelectric networks and ferroelectric moiré superlattice domains in twistronic WS${}_2$/MoS${}_2$ and WSe${}_2$/MoSe${}_2$ bilayers
• Quantum Monte Carlo calculations of energy gaps from first principles
• Superposition of intra- and inter-layer excitons in twistronic MoSe${}_2$/WSe${}_2$ bilayers probed by resonant Raman scattering
• Theory of moiré localized excitons in transition-metal dichalcogenide heterobilayers
• Few-body systems in condensed matter physics
• Polaron spectroscopy of a bilayer excitonic insulator
• Tuning of impurity-bound interlayer complexes in a van der Waals heterobilayer
• Self-organised quantum dots in marginally twisted MoSe${}_2$/WSe${}_2$ and MoS${}_2$/WS${}_2$ bilayers
• Magnetoexcitons in transition-metal dichalcogenides monolayers, bilayers, and van der Waals heterostructures
• Interlayer exciton-polaron in atomically thin semiconductors
• Plasmonic Quantum Dots in Twisted Bilayer Graphene
• Charge-carrier complexes in monolayer semiconductors
• Inheritance of the exciton geometric structure from Bloch electrons in two-dimensional layered semiconductors
• Dipolar interactions enhanced by two-dimensional dielectric screening in few-layer van der Waals structures
• Exciton interacting with a moiré lattice: Polarons, strings, and optical probing of spin correlations
• Coupled exciton internal and center-of-mass motions in two-dimensional semiconductors by a periodic electrostatic potential
• Melting of electronic and excitonic crystals in 2D semiconductor moiré patterns: a perspective from the Lindemann criterion
• Twistronics and moiré superlattice physics in 2D transition metal dichalcogenides
• Electrically tunable and enhanced nonlinearity of moiré exciton-polaritons in transition metal dichalcogenide bilayers
• Chiral excitonic systems in twisted bilayers from Förster coupling and unconventional excitonic Hall effects
• Anyon-trions in atomically thin semiconductor heterostructures
• Chiral phonons of honeycomb-type bilayer Wigner crystals
• Engineering topological exciton structures in two-dimensional semiconductors by a periodic electrostatic potential
• Non-local interactions and supersolidity of moiré excitons
• Excited Rydberg States in TMD Heterostructures
• Interaction enhanced inter-site hoppings for holons and interlayer exciton insulators in moiré correlated insulators
• Emergence of a condensate with finite-energy Cooper pairing in hybrid exciton/superconductor systems