Enhanced quantized current driven by surface acoustic waves

J. Ebbecke, G. Bastian, M. Blöcker, K. Pierz, F. J. Ahlers

Published 2000-06-30Version 1

We present the experimental realization of different approaches to increase the amount of quantized current which is driven by surface acoustic waves through split gate structures in a two dimensional electron gas. Samples with driving frequencies of up to 4.7 GHz have been fabricated without a deterioration of the precision of the current steps, and a parallelization of two channels with correspondingly doubled current values have been achieved. We discuss theoretical and technological limitations of these approaches for metrological applications as well as for quantum logics.