Oscillations in the acousto-electric proximity coupling to a 2D electron gas

doi:10.1016/0038-1098(88)90376-6

Solid State Communications

Volume 65, Issue 7, February 1988, Pages 739-742

https://doi.org/10.1016/0038-1098(88)90376-6 Get rights and content

Abstract

We report the first results on proximity coupling of surface acoustic waves to a two dimensional electron gas. A GaAs-Al_xGa_1−xAs heterojunction was placed in close proximity to the surface of a piezoelectric substrate on which a surface acoustic wave was propagated. Oscillations in the attenuation of the surface wave, corresponding to the Shubnikov-de Haas oscillations in σ_xx, were observed as a function of applied magnetic field. Break down of the σ_xx = 0 state is seen at moderate power levels for the SAW. This is interpreted as either large current effects or due to spatial modulation of the Landau levels.

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^†: Research supported by US Air Force Office for Scientific Research under Grant No. AFOSR 84-0350.

^∗: Present address: Department of Physics, Fudan University, Shanghai, People's Republic of China.

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Oscillations in the acousto-electric proximity coupling to a 2D electron gas

Abstract

Phys. Rev. Lett.

Phys. Rev.

Phys. Rev. Lett.

J. Appl. Phys.

IEEE Trans. Sonics Ultras.

IEEE Trans. Elec. Dev.