Stability of trions in coupled quantum wells modelled by two-dimensional bilayers

Abstract

We report variational and diffusion quantum Monte Carlo calculations of the binding energies of indirect trions and biexcitons in ideal two-dimensional bilayer systems within the effective-mass approximation, and with a Coulomb $1/r$ interaction between charge carriers. The critical layer separation at which trions become unbound has been studied for various electron-hole mass ratios, and found to be over an order of magnitude larger than the critical layer separation for biexcitons.

References in corpus (8)

• Valley Zeeman Effect in Elementary Optical Excitations of a Monolayer WSe2
• Continuum variational and diffusion quantum Monte Carlo calculations
• Jastrow correlation factor for atoms, molecules, and solids
• Analysis of the exciton-exciton interaction in semiconductor quantum wells
• Diffusion quantum Monte Carlo study of excitonic complexes in two-dimensional transition-metal dichalcogenides
• Coherence Length of Cold Exciton Gases in Coupled Quantum Wells
• Exciton and biexciton energies in bilayer systems
• Biexcitons in two-dimensional systems with spatially separated electrons and holes

Cited by in corpus (10)

• Variational and Diffusion Quantum Monte Carlo Calculations with the CASINO Code
• Localized bright luminescence of indirect excitons and trions in MoSe${}_2$/WSe${}_2$ van der Waals heterostructure
• Electrically Controlled Two-Dimensional Electron-Hole Fluids
• Few-body systems in condensed matter physics
• Electrostatics of electron-hole interactions in van der Waals heterostructures
• Complexes of dipolar excitons in layered quasi-two-dimensional nanostructures
• Realizing Topological Superconductivity in Tunable Bose-Fermi Mixtures with Transition Metal Dichalcogenide Heterostructures
• Strong-coupling phases of trions and excitons in electron-hole bilayers at commensurate densities
• Crystal Phases of Charged Interlayer Excitons in van der Waals Heterostructures
• Magnetic-Field-Induced Wigner Crystallization of Charged Interlayer Excitons in van der Waals Heterostructures