Abstract:
Excitons and trions in bilayer structures based on transition metal dichalcogenides are theoretically studied. Expressions for the effective potential of interparticle interaction in such a system with allowance for a significant dielectric contrast in the heterostructure are obtained. Simple and physically justified variational functions for electron–hole complexes are proposed. A variational calculation of the exciton and trion binding energies as functions of the interlayer distance, taking into account the specific features of the screening of the Coulomb interaction, is performed. The accuracy of the variational approach is confirmed by direct numerical calculation of the exciton binding energy as a function of the interlayer distance.
Keywords:
spatially indirect exciton, trion, monolayers of transitional metal diсhalcogenides, bilayer structures, Rytova–Keldysh potential.
Citation:
M.A. Semina, “Excitons and trions in bilayer van der Waals heterostructures”, Fizika Tverdogo Tela, 61:11 (2019), 2234–2239; Phys. Solid State, 61:11 (2019), 2218–2223
\Bibitem{Sem19}
\by M.A.~Semina
\paper Excitons and trions in bilayer van der Waals heterostructures
\jour Fizika Tverdogo Tela
\yr 2019
\vol 61
\issue 11
\pages 2234--2239
\mathnet{http://mi.mathnet.ru/ftt8642}
\crossref{https://doi.org/10.21883/FTT.2019.11.48434.531}
\elib{https://elibrary.ru/item.asp?id=41300799}
\transl
\jour Phys. Solid State
\yr 2019
\vol 61
\issue 11
\pages 2218--2223
\crossref{https://doi.org/10.1134/S1063783419110301}
Linking options:
https://www.mathnet.ru/eng/ftt8642
https://www.mathnet.ru/eng/ftt/v61/i11/p2234
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