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. 2022 Apr 22;12(9):1437. doi: 10.3390/nano12091437

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The exciton binding energy $E_{b} (α, Δ, D)$ for CV and CI excitons as functions of the interlayer separation D for chosen parameter $α = 0.6$ and gap $Δ = 0.5 ħ v_{F} / a$ .