Abstract
The phenomenon of microwave-induced magnetoresistance oscillations is studied in a series of ZnO/MgZnO heterojunctions characterized by different two-dimensional electron densities n. It is found that the effective electron mass m* determined from the period of microwave-induced magnetoresistance oscillations depends essentially on this parameter. For high densities, the value of m* tends to the effective electron mass in bulk ZnO, while for low densities, m* increases pronouncedly and becomes considerably larger than the electron cyclotron mass. The experimental results give clear evidence of a significant impact of the electron–electron interaction on microwave-induced magnetoresistance oscillations.
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Original Russian Text © A.V. Shchepetilnikov, Yu.A. Nefyodov, A.A. Dremin, I.V. Kukushkin, 2018, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2018, Vol. 107, No. 12, pp. 799–802.
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Shchepetilnikov, A.V., Nefyodov, Y.A., Dremin, A.A. et al. Renormalization of the Effective Electron Mass Governing the Period of Microwave-Induced Resistance Oscillations in ZnO/MgZnO Heterojunctions. Jetp Lett. 107, 770–773 (2018). https://doi.org/10.1134/S0021364018120135
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DOI: https://doi.org/10.1134/S0021364018120135