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Commensurability oscillations in the surface-acoustic-wave-induced acoustoelectric effect in a two-dimensional electron gas

Robinson, John P. and Falko, Vladimir I. (2005) Commensurability oscillations in the surface-acoustic-wave-induced acoustoelectric effect in a two-dimensional electron gas. Physical Review B, 71. p. 241301. ISSN 1550-235X

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Abstract

We study the acoustoelectric effect generated by surface acoustic waves (SAW) in a high-mobility two-dimensional electron gas with isotropic and especially small-angle impurity scattering. In both cases the acoustoelectric effect exhibits Weiss oscillations periodic in B–1 due to the commensurability of the SAW period with the size of the cyclotron orbit and resonances at the SAW frequency =kc multiple of the cyclotron frequency. We describe how oscillations in the acoustoelectric effect are damped in low fields where c*1 (with the time scale * dependent on the type of scattering) and find its nonoscillatory part, which remains finite to the lowest fields.

Item Type: Article
Journal or Publication Title: Physical Review B
Uncontrolled Keywords: two-dimensional electron gas ; surface acoustic waves ; acoustoelectric effects ; impurity scattering ; cyclotron resonance
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 9690
Deposited By: Ms Margaret Calder
Deposited On: 19 Jun 2008 15:12
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 18:41
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/9690

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