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Microwave photoresistance in a two-dimensional electron system with anisotropic mobility

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Abstract

The effect of microwave radiation on magnetotransport in single GaAs quantum wells with anisotropic mobility, whose maximum corresponds to the \([1\bar 10]\) direction and minimum to the [110] direction, is investigated using the Van der Pauw method. In samples shaped as squares with sides oriented along the \([1\bar 10]\) and [110] directions, giant oscillations of magnetoresistance arise under the effect of a microwave field for the both \([1\bar 10]\) and [110] orientations of the measuring current I ac. In the anisotropic two-dimensional system under study, the relative amplitude of microwave photoresistance oscillations in a magnetic field weakly depends on the orientation of I ac. At a temperature of 4.2 K and a microwave frequency of 130 GHz, magnetic field intervals characterized by close-to-zero resistance manifest themselves only for the case of the [110] orientation of I ac. The aforementioned experimental results are qualitatively explained by a quasi-one-dimensional potential modulation of the two-dimensional electron gas in the [110] direction.

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Authors and Affiliations

  1. Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    A. A. Bykov, D. R. Islamov, A. V. Goran & A. K. Bakarov

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  1. A. A. Bykov
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  2. D. R. Islamov
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  3. A. V. Goran
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  4. A. K. Bakarov
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Correspondence to A. A. Bykov.

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Original Russian Text © A.A. Bykov, D.R. Islamov, A.V. Goran, A.K. Bakarov, 2007, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 12, pp. 891–895.

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Bykov, A.A., Islamov, D.R., Goran, A.V. et al. Microwave photoresistance in a two-dimensional electron system with anisotropic mobility. Jetp Lett. 86, 779–782 (2008). https://doi.org/10.1134/S002136400724006X

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  • DOI: https://doi.org/10.1134/S002136400724006X

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