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

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

2004-02-24

arxiv.org/abs/cond-mat/0402590v1

Eur. Phys. J. B 39, 385--396 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 8 figures

Scientific paper

10.1140/epjb/e2004-00204-0

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.

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