Robust single-parameter quantized charge pumping

Kaestner, B.; Kashcheyevs, V.; Hein, G.; Pierz, K.; Siegner, U.; Schumacher, H. W.
May 2008
Applied Physics Letters;5/12/2008, Vol. 92 Issue 19, p193902
Academic Journal
This paper investigates a scheme for quantized charge pumping based on single-parameter modulation. The device was realized in an AlGaAs–GaAs gated nanowire. We find a remarkable robustness of the quantized regime against variations in the driving signal, which increases with applied rf power. This feature, together with its simple configuration, makes this device a potential module for a scalable source of quantized current.


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