Robust single-parameter quantized charge pumping

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...

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Bibliographic Details
Published in:Applied physics letters 2008-05, Vol.92 (19), p.192106-192106-3
Main Authors: Kaestner, B., Kashcheyevs, V., Hein, G., Pierz, K., Siegner, U., Schumacher, H. W.
Format: Article
Language:English
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2928231