Abstract
We investigate the effect of the potential difference ΔVg between the two gate electrodes on the quantized acoustoelectric current induced by surface acoustic wave. A significant improvement on the precision of the quantized acoustoelectric current is achieved as a result of the potential difference ΔVg. Our calculated results demonstrate that the static potential barrier height is dramatically changed by ΔVg, and these changes can affect the shape of the quantum well, hence, the probability of events that contribute to the error in the quantized current is affected. Furthermore, the effect of the potential difference on the acoustoelectric current in the presence of the impurity potential is investigated.
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