Exciton complexes in low dimensional transition metal dichalcogenides

Abstract

We examine the excitonic properties of layered configurations of low dimensional transition metal dichalcogenides (LTMDCs) using the fractional dimensional space approach. The binding energies of the exciton, trion and biexciton in LTMDCs of varying layers are analyzed, and linked to the dimensionality parameter $\alpha$, which provides insight into critical electro-optical properties (relative oscillator strength, absorption spectrum, exciton-exciton interaction) of the material systems. The usefulness of $\alpha$ is highlighted by its independence of the physical mechanisms underlying the confinement effects of geometrical structures. Our estimates of the binding energies of exciton complexes for the monolayer configuration of transition metal dichalcogenides suggest a non-collinear structure for the trion and a positronium-molecule-like square structure for the biexciton.

8 pages, edits

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Cited by in corpus (19)

• k.p theory for two-dimensional transition metal dichalcogenide semiconductors
• Binding energies of exciton complexes in transition metal dichalcogenides and effect of dielectric environment
• Intervalley biexcitons and many-body effects in monolayer MoS2
• The Coulomb interaction in monolayer transition-metal dichalcogenides
• Room temperature observation of biexcitons in exfoliated WS2 monolayers
• Dynamical screening in monolayer transition-metal dichalcogenides and its manifestations in the exciton spectrum
• Marrying excitons and plasmons in monolayer transition-metal dichalcogenides
• Excitonic effects in the optical properties of 2D materials: An equation of motion approach
• Excitonic effects in two-dimensional semiconductors: Path integral Monte Carlo approach
• Theory of intervalley Coulomb interactions in monolayer transition-metal dichalcogenides
• Theoretical investigation of electron-hole complexes in anisotropic two-dimensional materials
• Exciton formation assisted by longitudinal optical phonons in monolayer transition metal dichalcogenides
• Few-body systems in condensed matter physics
• Generalized scaling law for exciton binding energy in two-dimensional materials
• Ultrafast exciton relaxation in monolayer transition metal dichalcogenides
• Simulations of Trions and Biexcitons in Layered Hybrid Organic-Inorganic Lead Halide Perovskites
• On Binding Energy of Trions in Bulk Materials
• Influence of the Pauli exclusion principle on scattering properties of cobosons
• Transition-metal dichalcogenide heterostructure solar cells: A numerical study