Excitons in planar quantum wells based on transition metal dichalcogenides

Abstract

The problem of a size quantization for charge carriers in a planar quantum well consisting of different monolayers of transition metal dichalcogenides is solved using the Dirac model and the four-band model. For excitons, bound states of electrons and holes at the size quantization levels in such a quantum well, the energy spectrum was found in two cases: the Bohr radius is much smaller than the width of the quantum well (dielectric permeability of a substrate is relatively small) and the Bohr radius is much larger than it (the case of a strong dielectric screening). It is shown that the energy spectrum in these two cases is completely different. A method for the synthesis of the heterostructures under consideration is also proposed.

12 pages, 6 figures, 2 tables

References in corpus (11)

• Valley polarization in MoS2 monolayers by optical pumping
• Room Temperature All Semiconducting sub-10nm Graphene Nanoribbon Field-Effect Transistors
• Computational 2D Materials Database: Electronic Structure of Transition-Metal Dichalcogenides and Oxides
• Probing Excitonic Dark States in Single-layer Tungsten Disulfide
• High-temperature superfluidity with indirect excitons in van der Waals heterostructures
• Molecular-beam epitaxy of monolayer and bilayer WSe2: A scanning tunneling microscopy/spectroscopy study and deduction of exciton binding energy
• Magneto-optics in transition metal diselenide monolayers
• Experimental Observation of Strong Exciton Effects in Graphene Nanoribbons
• Localized bright luminescence of indirect excitons and trions in MoSe${}_2$/WSe${}_2$ van der Waals heterostructure
• Towards superfluidity of dipolar excitons in a TMDC double layer
• Size Quantization in Planar Graphene-Based Heterostructures: Pseudospin Splitting, Interface States, and Excitons

Cited by in corpus (4)

• A colloquium on the variational method applied to excitons in 2D materials
• Exciton oscillator strength in two-dimensional Dirac materials
• Phase diagram of electron-hole liquid in monolayer heterostructures based on transition metal dichalcogenides
• Charge-separated electron-hole liquid in transition metal dichalcogenide heterostructures