Abstract
Magneto-absorption in HgTe/CdHgTe quantum wells with an inverted band structure in magnetic fields up to 30 T has been studied. It has been shown that the positions of magneto-absorption lines for transitions from the zero-mode Landau levels in a wide range of magnetic field cannot in principle be described in the “single-electron” approximation using the eight-band Kane model even taking into account effects associated with the absence of spatial inversion symmetry. The revealed dependence of the energies of optical transitions on the magnetic field can be qualitatively explained within a “many-body” picture, where transitions between Landau levels are considered as collective modes hybridized by the electron-electron interaction.
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Funding
This work was supported by the Russian Science Foundation (project no. RSF-ANR 20-42-09039), by Agence nationale de la recherche (project Colector), and by Laboratoire National des Champs Magnétiques Intenses LNCMI-G, member of the European Magnetic Field Laboratory.
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Russian Text © The Author(s), 2020, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2020, Vol. 112, No. 8, pp. 541–546.
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Bovkun, L.S., Ikonnikov, A.V., Krishtopenko, S.S. et al. Effects of the Electron—Electron Interaction in the Magneto-Absorption Spectra of HgTe/CdHgTe Quantum Wells with an Inverted Band Structure. Jetp Lett. 112, 508–512 (2020). https://doi.org/10.1134/S0021364020200059
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DOI: https://doi.org/10.1134/S0021364020200059