Microwave photoresistance in a two-dimensional electron system with anisotropic mobility |
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Authors: | A A Bykov D R Islamov A V Goran and A K Bakarov |
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Institution: | (1) Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia |
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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
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
and 110] directions, giant oscillations of magnetoresistance arise under the effect of a microwave field for the both
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.
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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Keywords: | |
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