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Giant Oscillations of Acoustoelectric Current in a Quantum Channel

Harald Totland·Yuri Galperin
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Abstract

A theory of d.c. electric current induced in a quantum channel by a propagating surface acoustic wave (acoustoelectric current) is worked out. The first observation of the acoustoelectric current in such a situation was reported by J. M. Shilton et al., Journ. Phys. C (to be published). The authors observed a very specific behavior of the acoustoelectric current in a quasi-one-dimensional channel defined in a GaAs-AlGaAs heterostructure by a split-gate depletion -- giant oscillations as a function of the gate voltage. Such a behavior was qualitatively explained by an interplay between the energy-momentum conservation law for the electrons in the upper transverse mode with a finite temperature splitting of the Fermi level. In the present paper, a more detailed theory is developed, and important limiting cases are considered.

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Harald Totland, Yuri Galperin. 1996-03-31. Giant Oscillations of Acoustoelectric Current in a Quantum Channel. https://doi.org/10.1103/physrevb.54.8814

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