Solid State Theory Conference, St. Petersburg, May 14-16, 2025

Multiparticle complexes in encapsulated monolayers of transition metal dichalco-genides

V. E. Bisti^a, G. M. Golyshkov^ab, A. S. Brichkin^a, A. V. Chernenko<sup>a

a</sup> Osipyan Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region
^b Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Moscow Region

Abstract: The formation of multiparticle complexes in structures consisting of monolayers of transition metal dichalcogenides encapsulated by hexagonal boron nitride was stud-ied. The binding energies of trions and excitons localized on charged impurities were calculated for interactions considered as charge-dipole interactions at long distances and approximated in two different ways at short distances. The range of polarizabil-ity values was chosen so that the obtained binding energies of the complexes were close to those observed experimentally. Comparison of the calculations allowed us to estimate the permissible range of exciton polarizability and identify the most realistic approximation of the dipole-charge interaction at short distances. The electron con-centration was estimated from the intensity ratio of excitons and multiparticle com-plexes in the reflectance spectrum.

Keywords: transition metal dichalcogenides, boron nitride, trions and excitons.

Received: 30.06.2025
Revised: 22.07.2025
Accepted: 25.07.2025

DOI: 10.61011/FTT.2025.09.61634.1-25

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