https://doi.org/10.1140/epjb/e2004-00204-0
Quantized charge pumping by surface acoustic waves in ballistic quasi-1D channels
1
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
Corresponding author: a slava@latnet.lv
Received:
24
February
2004
Published online:
12
July
2004
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