Excitonic effects in two-dimensional semiconductors: Path integral Monte Carlo approach

Abstract

One of the most striking features of novel 2D semiconductors (e.g., transition metal dichalcogenide monolayers or phosphorene) is a strong Coulomb interaction between charge carriers resulting in large excitonic effects. In particular, this leads to the formation of multi-carrier bound states upon photoexcitation (e.g., excitons, trions and biexcitons), which could remain stable at near-room temperatures and contribute significantly to optical properties of such materials. In the present work we have used the Path Integral Monte Carlo methodology to numerically study properties of multi-carrier bound states in 2D semiconductors. Specifically, we have accurately investigated and tabulated the dependence of single exciton, trion and biexciton binding energies on the strength of dielectric screening, including the limiting cases of very strong and very weak screening. The results of this work are potentially useful in the analysis of experimental data and benchmarking of theoretical and computational models.

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Cited by in corpus (27)

• Layer-dependent properties of SnS2 and SnSe2 novel two-dimensional materials
• Exciton Diamagnetic Shifts and Valley Zeeman Effects in Monolayer WS${}_2$ and MoS${}_2$ to 65 Tesla
• Many-Body Theory of Trion Absorption Features in Two-Dimensional Semiconductors
• Probing the influence of dielectric environment on excitons in monolayer WSe2: Insight from high magnetic fields
• The dielectric impact of layer distances on exciton and trion binding energies in van der Waals heterostructures
• The Coulomb interaction in monolayer transition-metal dichalcogenides
• Diffusion quantum Monte Carlo study of excitonic complexes in two-dimensional transition-metal dichalcogenides
• Electron-exciton interactions in the exciton-polaron problem
• 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
• Towards superfluidity of dipolar excitons in a TMDC double layer
• Superfluidity of Dipolar Excitons in a Black Phosphorene Double Layer
• Excitons and optical spectra of phosphorene nanoribbons
• Trion and Biexciton in Monolayer Transition Metal Dichalcogenides
• Trion induced photoluminescence of a doped MoS2 monolayer
• Few-body systems in condensed matter physics
• Complexes of dipolar excitons in layered quasi-two-dimensional nanostructures
• Giant excitonic effects in bulk vacancy-ordered double perovskites
• Three-particle states and brightening of intervalley excitons in a doped MoS${}_2$ monolayer
• Simulations of Trions and Biexcitons in Layered Hybrid Organic-Inorganic Lead Halide Perovskites
• On Binding Energy of Trions in Bulk Materials
• Sumanene monolayer of pure carbon: a two-dimensional Kagome-analogy lattice with desirable band gap, ultrahigh carrier mobility and strong exciton binding energy
• Excited-State Trions in Two Dimensional Materials
• Charge-carrier complexes in monolayer semiconductors
• Robust polaritons in magnetic monolayers of CrI3
• Modelling excitonic Mott transitions in two-dimensional semiconductors