Theoretical investigation of electron-hole complexes in anisotropic two-dimensional materials

Abstract

Trions and biexcitons in anisotropic two-dimensional materials are investigated within an effective mass theory. Explicit results are obtained for phosphorene and arsenene, materials that share features such as a direct quasi-particle gap and anisotropic conduction and valence bands. Trions are predicted to have remarkably high binding energies and an elongated electron-hole structure with a preference for alignment along the armchair direction, where the effective masses are lower. We find that biexciton binding energies are also notably large, especially for monolayer phosphorene, where they are found to be twice as large as those for typical monolayer transition metal dichalcogenides.

3 figures, 5 pages + Supplementary Material, accepted for publication in Phys. Rev. B

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Cited by in corpus (15)

• Polaritons in layered 2D materials
• Determination of layer-dependent exciton binding energies in few-layer black phosphorus
• Diffusion quantum Monte Carlo study of excitonic complexes in two-dimensional transition-metal dichalcogenides
• Stark shift of excitons and trions in two-dimensional materials
• Inverse Funnel Effect of Excitons in Strained Black Phosphorus
• $k\cdot p$ theory for phosphorene: Effective g-factors, Landau levels, and excitons
• Few-body systems in condensed matter physics
• Light-matter interaction in van der Waals heterostructures
• Strongly-bound excitons and trions in anisotropic 2D semiconductors
• Substrate effects on the exciton fine structure of black phosphorus quantum dots
• Excitonic complexes in anisotropic atomically thin two-dimensional materials: black phosphorus and TiS${}_3$
• Simulations of Trions and Biexcitons in Layered Hybrid Organic-Inorganic Lead Halide Perovskites
• On Binding Energy of Trions in Bulk Materials
• Charging energy spectrum of black phosphorus quantum dots
• Excitons and trions in CrSBr bilayers