Excitons, trions, and biexcitons in transition metal dichalcogenides: magnetic field dependence

Abstract

The influence of a perpendicular magnetic field on the binding energy and structural properties of excitons, trions, and biexcitons in monolayers of semiconducting transition metal dichalcogenides (TMDs) is investigated. The stochastic variational method (SVM) with a correlated Gaussian basis is used to calculate the different properties of these few-particle systems. In addition, we present a simplified variational approach which supports the SVM results for excitons as a function of magnetic field. The exciton diamagnetic shift is compared with recent experimental results and we extend this concept to trions and biexcitons. The effect of a local potential fluctuation, which we model by a circular potential well, on the binding energy of trions and biexcitons is investigated and found to significantly increase the binding of those excitonic complexes.

arXiv comment12 pages, 7 figures, 5 tables

References in corpus (52)

• The electronic properties of graphene
• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Atomically thin MoS2: A new direct-gap semiconductor
• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Control of valley polarization in monolayer MoS2 by optical helicity
• Valley polarization in MoS2 monolayers by optical pumping
• Observation of tightly bound trions in monolayer MoS2
• MoS_2 as an ideal material for valleytronics: valley-selective circular dichroism and valley Hall effect
• Exciton Binding Energy and Nonhydrogenic Rydberg Series in Monolayer WS2
• Observation of giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
• Electrical Control of Two-Dimensional Neutral and Charged Excitons in a Monolayer Semiconductor
• Optical Generation of Excitonic Valley Coherence in Monolayer WSe2
• Tightly bound excitons in monolayer WSe2
• Theory of Neutral and Charged Excitons in Monolayer Transition Metal Dichalcogenides
• Magnetic Control of Valley Pseudospin in Monolayer WSe2
• Valley Zeeman Effect in Elementary Optical Excitations of a Monolayer WSe2
• Low-temperature photocarrier dynamics in monolayer MoS2
• Breaking of valley degeneracy by magnetic field in monolayer MoSe2
• Exciton Binding Energy of Monolayer WS2
• Dielectric screening in two-dimensional insulators: Implications for excitonic and impurity states in graphane
• Valley Splitting and Polarization by the Zeeman Effect in Monolayer MoSe2
• Robust optical emission polarization in MoS2 monolayers through selective valley excitation
• Enhancement of Carrier Mobility in Semiconductor Nanostructures by Dielectric Engineering
• Probing excitonic states in ultraclean suspended two-dimensional semiconductors by photocurrent spectroscopy
• Monolayer MoS2: trigonal warping, "Γ-valley", and spin-orbit coupling effects
• Exciton Diamagnetic Shifts and Valley Zeeman Effects in Monolayer WS${}_2$ and MoS${}_2$ to 65 Tesla
• Thickness-Dependent Interfacial Coulomb Scattering in Atomically Thin Field-Effect Transistors
• Identification of excitons, trions and biexcitons in single-layer WS2
• Binding energies of exciton complexes in transition metal dichalcogenides and effect of dielectric environment
• Trion induced negative photoconductivity in monolayer MoS2
• Probing the influence of dielectric environment on excitons in monolayer WSe2: Insight from high magnetic fields
• Charge Scattering and Mobility in Atomically Thin Semiconductors
• Effective lattice Hamiltonian for monolayer MoS2 : Tailoring electronic structure with perpendicular electric and magnetic fields
• Analytical approach to excitonic properties of MoS2
• Neutral and Charged Inter-Valley Biexcitons in Monolayer MoSe${}_2$
• Optical manipulation of the exciton charge state in single layer tungsten disulfide
• Intervalley Scattering and Localization Behaviors of Spin-Valley Coupled Dirac Fermions
• Intervalley biexcitons and many-body effects in monolayer MoS2
• Molecular-beam epitaxy of monolayer and bilayer WSe2: A scanning tunneling microscopy/spectroscopy study and deduction of exciton binding energy
• Probing charge scattering mechanisms in suspended graphene by varying its dielectric environment
• Excitonic valley effects in monolayer WS${}_2$ under high magnetic fields
• Excitons and charged excitons in semiconductor quantum wells
• Optical spectroscopy of excited exciton states in MoS2 monolayers in van der Waals heterostructures
• Binding energies of trions and biexcitons in two-dimensional semiconductors from diffusion quantum Monte Carlo calculations
• Binding energies and spatial structures of small carrier complexes in monolayer transition metal dichalcogenides via diffusion Monte Carlo
• Influence of well width fluctuations on the binding energy of excitons, charged excitons and biexcitons in GaAs-based quantum wells
• Magnetic field dependence of the energy of negatively charged excitons in semiconductor quantum wells
• Excitons and trions in monolayer transition metal dichalcogenides: A comparative study between the multiband model and the quadratic single-band model
• Large Range Manipulation of Exciton Species in Monolayer WS2
• Strong Valley Zeeman Effect of Dark Excitons in Monolayer Transition Metal Dichalcogenides in a Tilted Magnetic Field
• Large conduction band and Fermi velocity spin splittings due to Coulomb interactions in single-layer MoS_{2}
• Observation of three-particle complexes in WS${}_2$ monolayers

Cited by in corpus (27)

• Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields
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• Multipath optical recombination of intervalley dark excitons and trions in monolayer WSe${}_2$
• Exciton-Scattering-Induced Dephasing in Two-Dimensional Semiconductors
• The valley Zeeman effect in inter- and intra-valley trions in monolayer WSe${}_2$
• Luminescent emission of excited Rydberg excitons from monolayer WSe2
• Interaction-driven transport of dark excitons in 2D semiconductors with phonon-mediated optical readout
• Theoretical methods for excitonic physics in two-dimensional materials
• A colloquium on the variational method applied to excitons in 2D materials
• Exact solution of an exciton energy for a monolayer medium
• Excitonic complexes in anisotropic atomically thin two-dimensional materials: black phosphorus and TiS${}_3$
• Magnetoexcitons in transition-metal dichalcogenides monolayers, bilayers, and van der Waals heterostructures
• Monolayer transition metal dichalcogenides in strong magnetic fields: Validating the Wannier model using a microscopic calculation
• Variationally optimized orbital approach to trions in two-dimensional materials
• Excitonic theory of doping-dependent optical response in atomically thin semiconductors
• Excited-State Trions in Two Dimensional Materials
• Excitonic magneto-optics in monolayer transition metal dichalcogenides: From nanoribbons to two-dimensional response
• Effects of parallel electric and magnetic fields on Rydberg excitons in buckled two-dimensional materials
• Theory of the Coherent Response of Magneto-Excitons and Magneto-Biexcitons in Monolayer Transition Metal Dichalcogenides
• Charge-carrier complexes in monolayer semiconductors
• Strongly confined 2D parabolic quantum dot: Biexciton or Quadron?
• Magnetoexcitons in phosphorene monolayers, bilayers, and van der Waals heterostructures
• Thermal effect on magnetoexciton energy spectra in monolayer transition metal dichalcogenides
• Tunable effective masses of magneto-excitons in two-dimensional materials
• Impurity-induced pairing in two-dimensional Fermi gases
• Analytical exciton energies in monolayer transition-metal dichalcogenides
• Excitonic-trion population in two-dimensional halide perovskites