Eur. Phys. J. B 39, 385-396 (2004)
DOI: 10.1140/epjb/e2004-00204-0

Quantized charge pumping by surface acoustic waves in ballistic quasi-1D channels

V. Kashcheyevs¹, A. Aharony^{1, 2} and O. Entin-Wohlman<sup>1, 2, 3

1</sup>  School of Physics and Astronomy, Raymond and Beverly Sackler faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
²  Department of Physics, Ben Gurion University, Beer Sheva 84105, Israel
³  Albert Einstein Minerva Center for Theoretical Physics at the Weizmann Institute of Science, Rehovot 76100, Israel

slava@latnet.lv

(Received 24 February 2004 / Published online 12 July 2004)

Abstract
Adiabatic pumping of electrons induced by surface acoustic waves (SAWs) in a ballistic quasi-1D quantum channel is considered using an exactly solvable tight-binding model for non-interacting electrons. The single-electron degrees of freedom, responsible for acoustoelectric current quantization, are related to the transmission resonances. We study the influence of experimentally controllable parameters (SAW power, gate voltage, source-drain bias, amplitude and phase of a secondary SAW beam) on the plateau-like structure of the acoustoelectric current. The results are consistent with existing experimental observations.

PACS
73.23.-b - Electronic transport in mesoscopic systems.
73.50.Rb - Acoustoelectric and magnetoacoustic effects.
73.40.Ei - Rectification .

© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2004

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