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Anomalous Anti-Stokes Scattering Signal as an Indicator of Macrofilled Magnetoexciton Levels in the Quantum Hall Effect Regime

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Abstract

The Raman study of strongly interacting two-dimensional electron systems based on ZnO/MgZnO has revealed an anomalously intense spectral line of the anti-Stokes component of the spin exciton. This line is manifested near the filling factor v = 2 at the ferromagnetic ordering of the spin subsystem, whereas it is not observed at the paramagnetic ordering. It has been shown that this line can be attributed to the formation of an ensemble of long-lived collective excitations in the ferromagnetic phase at a filling factor of v = 2.

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Funding

This work was supported by the Russian Foundation for Basic Research (project no. 19-32-90203, optical experiments) and by the Russian Science Foundation (project no. 19-42-04119, access to the equipment of the Joint Usage Center, Institute of Solid State Physics, Russian Academy of Sciences).

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Correspondence to B. D. Kaysin.

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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. 1, pp. 62–67.

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Kaysin, B.D., Vankov, A.B. & Kukushkin, I.V. Anomalous Anti-Stokes Scattering Signal as an Indicator of Macrofilled Magnetoexciton Levels in the Quantum Hall Effect Regime. Jetp Lett. 112, 53–57 (2020). https://doi.org/10.1134/S002136402013007X

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  • DOI: https://doi.org/10.1134/S002136402013007X

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