Abstract
Microwave-induced magnetoresistance and magnetoconductance oscillations in the two-dimensional electron system have been detected in a ZnO/Mg x Zn1–x O heterojunction. The structure has a high electron density of n = 6.5 × 1011 cm–2 and a very low mobility of 105 cm2 V–1 s–1. This clearly indicates that the mobility of two-dimensional electrons is not a critical parameter for the observation of microwave-induced oscillations. The samples were both Hall bars and Corbino disks. At least four oscillations have been resolved. Their amplitude increases with the magnetic field and all oscillations with numbers >1 have the same phase of 0.25. It has been shown that the microwave-induced photoelectromotive force is also a periodically oscillating function of the inverse magnetic field.
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Original Russian Text © A.V. Shchepetilnikov, Yu.A. Nefyodov, I.V. Kukushkin, 2015, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2015, Vol. 102, No. 12, pp. 927–931.
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Shchepetilnikov, A.V., Nefyodov, Y.A. & Kukushkin, I.V. Observation of Microwave-Induced Magnetoresistance Oscillations in a ZnO/Mg x Zn1–x O Heterojunction. Jetp Lett. 102, 811–814 (2015). https://doi.org/10.1134/S0021364015240108
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DOI: https://doi.org/10.1134/S0021364015240108