Magnetic field enhanced robustness of quantized current plateaus in single and double quantum dot non-adiabatic single charge pumps

We compare the robustness of the quantized current plateaus of semiconductor non-adiabatic quantized charge pumps consisting of a single quantum dot (SQD) and two QDs connected in series (DQD). For the SQD application of a perpendicular magnetic field leads to an enhanced robustness of the first cur...

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Bibliographic Details
Main Authors: Mirovsky, P, Leicht, C, Kaestner, B, Kashcheyevs, V, Pierz, K, Schumacher, H W
Format: Conference Proceeding
Language:English
Subjects:
Charge pumps
Electromagnetic measurements
Frequency
Gallium arsenide
Geometry
Magnetic field measurement
Magnetic fields
Quantum dots
Robustness
Voltage
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Summary:We compare the robustness of the quantized current plateaus of semiconductor non-adiabatic quantized charge pumps consisting of a single quantum dot (SQD) and two QDs connected in series (DQD). For the SQD application of a perpendicular magnetic field leads to an enhanced robustness of the first current plateau I = ef, with f the pumping frequency and e the elementary charge. In contrast for the DQD a comparably enhanced robustness of the plateau I = 2ef is found. These findings might allow generation of higher currents without compromising quantization accuracy by optimizing the device geometry.
ISSN:0589-1485
2160-0171
DOI:10.1109/CPEM.2010.5544459