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Cyclotron resonance of Dirac ferions in HgTe quantum wells

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Abstract

Cyclotron resonance of single-valley two-dimensional Dirac fermions in HgTe-based quantum wells has been experimentally investigated. The thickness of the wells is close to the critical value corresponding to the transition from the direct energy spectrum to the inverted spectrum. Under terahertz laser irradiation, transitions between the ground and first Landau levels, as well as between the first and second Landau levels, have been observed. Low magnetic fields corresponding to the cyclotron resonance, as well as the strong dependence of the position of the resonance on the electron density, indicate the Dirac character of the spectrum in these quantum wells. It has been shown that disorder plays an important role in the formation of the spectrum of two-dimensional Dirac fermions.

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Correspondence to D. A. Kozlov.

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Original Russian Text © Z.D. Kvon, S.N. Danilov, D.A. Kozlov, C. Zoth, N.N. Mikhailov, S.A. Dvoretskii, S.D. Ganichev, 2011, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2011, Vol. 94, No. 11, pp. 895–899.

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Kvon, Z.D., Danilov, S.N., Kozlov, D.A. et al. Cyclotron resonance of Dirac ferions in HgTe quantum wells. Jetp Lett. 94, 816–819 (2012). https://doi.org/10.1134/S002136401123007X

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  • DOI: https://doi.org/10.1134/S002136401123007X

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