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Single electron pumping in InAs nanowire double quantum dots

2007; American Institute of Physics; Volume: 91; Issue: 5 Linguagem: Inglês

10.1063/1.2767197

1520-8842

Andreas Fuhrer, Carina Fasth, Lars Samuelson,

Semiconductor materials and devices

Closely spaced local gate electrodes are used to electrically define a double quantum dot along an InAs nanowire crystal. By applying a periodic pulse sequence to two plunger gate electrodes controlling the double quantum dot charge configuration, the device is operated as a single electron pump. The authors find that within measurement accuracy, the pumping current equals one electron per cycle for frequencies up to 2MHz, demonstrating the suitability of nanowire based quantum dots for pumping applications.