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.

arXiv comment12 pages, 6 figures, 2 tables

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Cited by in corpus (4)

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• Phase diagram of electron-hole liquid in monolayer heterostructures based on transition metal dichalcogenides
• Charge-separated electron-hole liquid in transition metal dichalcogenide heterostructures