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arXiv · 1905.05282

Excitons in planar quantum wells based on transition metal dichalcogenides

Pavel V. Ratnikov
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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.

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Pavel V. Ratnikov. 2020-04-28. Excitons in planar quantum wells based on transition metal dichalcogenides. https://doi.org/10.1103/physrevb.102.085303

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