Intervalley electron-hole exchange interaction and impurity-assisted recombination of indirect excitons in WS${}_2$ and WSe${}_2$ monolayers

Abstract

The variety of excitonic states in tungsten-based dichalcogenide monolayers stems from unique interplay between the spin and valley degrees of freedom. One of the exciton species is the indirect exciton (momentum or valley dark), which is responsible to a series of resonances when the monolayer is charge neutral. We investigate the short-range electron-hole exchange interaction of the indirect exciton, as well as its recombination mechanism mediated by impurities. The analysis provides thorough understanding of the energy and polarization of the zero-phonon indirect exciton resonance in the emission spectrum.

References in corpus (41)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• The PseudoDojo: Training and grading a 85 element optimized norm-conserving pseudopotential table
• Three-band tight-binding model for monolayers of group-VIB transition metal dichalcogenides
• Dielectric screening in two-dimensional insulators: Implications for excitonic and impurity states in graphane
• Magnetic brightening and control of dark excitons in monolayer WSe2
• Precise solution of few-body problems with stochastic variational method on correlated Gaussian basis
• Screening and Many-Body Effects in Two-Dimensional Crystals: Monolayer MoS${}_2$
• In-plane Propagation of Light in Transition Metal Dichalcogenide Monolayers: Optical Selection Rules
• 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${}_2$
• Magneto-Optics of Exciton Rydberg States in a Monolayer Semiconductor
• Excitons in van der Waals heterostructures: The important role of dielectric screening
• Charge-tuneable biexciton complexes in monolayer WSe${}_2$
• Revealing the Biexciton and Trion-exciton Complexes in BN Encapsulated WSe2
• Transport Theory of Monolayer Transition-Metal Dichalcogenides through Symmetry
• Radiative Lifetimes of Excitons and Trions in Monolayers of Metal Dichalcogenide MoS2
• Fine Structure and Lifetime of Dark Excitons in Transition Metal Dichalcogenide Monolayers
• Valley Phonons and Exciton Complexes in a Monolayer Semiconductor
• Polarization analysis of excitons in monolayer and bilayer transition-metal dichalcogenides
• Coulomb-bound four- and five-particle valleytronic states in an atomically-thin semiconductor
• Emerging Photoluminescence from the Dark-Exciton Phonon Replica in Monolayer WSe2
• The Coulomb interaction in monolayer transition-metal dichalcogenides
• Spin and valley dynamics of excitons in transition metal dichalcogenides monolayers
• Gate tunable dark trions in monolayer WSe${}_2$
• Long-Lived Valley Polarization of Intra-Valley Trions in Monolayer WSe2
• Momentum-Dark Intervalley Exciton in Monolayer Tungsten Diselenide Brightened via Chiral Phonon
• Screened potential of a point charge in a thin film
• Spin-flip processes and radiative decay of dark intravalley excitons in transition metal dichalcogenide monolayers
• Long valley lifetime of dark excitons in single-layer WSe2
• Multipath optical recombination of intervalley dark excitons and trions in monolayer WSe${}_2$
• Dynamical screening in monolayer transition-metal dichalcogenides and its manifestations in the exciton spectrum
• Donor-driven spin relaxation in multi-valley semiconductors
• Measurement of Conduction and Valence Bands g-factors in a Transition Metal Dichalcogenide Monolayer
• Intrinsic Donor-Bound Excitons in Ultraclean Monolayer Semiconductors
• Relaxation and darkening of excitonic complexes in electrostatically-doped monolayer semiconductors: Roles of exciton-electron and trion-electron interactions
• Rydberg series of dark excitons and the conduction band spin-orbit splitting in monolayer WSe${}_2$
• Theory of Spin-Dependent Phonon-Assisted Optical Transitions in Silicon
• Virtual trions in the photoluminescence of monolayer transition-metal dichalcogenides
• Exciton valley depolarization in monolayer transition-metal dichalcogenides
• Effective Dynamics of 2D Bloch Electrons in External Fields Derived From Symmetry

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