6533b85afe1ef96bd12b96e6
RESEARCH PRODUCT
Constructive role of non-adiabaticity for quantized charge pumping
B. KaestnerC. LeichtP. MirovskyV. KashcheyevsE. V. KurganovaU. ZeitlerK. PierzH. W. SchumacherJisoon IhmHyeonsik Cheongsubject
PhysicsRange (particle radiation)Condensed Matter - Mesoscale and Nanoscale PhysicsNanowirePhysics::OpticsFOS: Physical sciences020206 networking & telecommunications02 engineering and technologyConstructiveTemperature measurementCharge pumpingModulationQuantum dotQuantum electrodynamicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)0202 electrical engineering electronic engineering information engineering020201 artificial intelligence & image processingCurrent (fluid)description
We investigate a recently developed scheme for quantized charge pumping based on single-parameter modulation. The device was realized in an AlGaAl-GaAs gated nanowire. It has been shown theoretically that non-adiabaticity is fundamentally required to realize single-parameter pumping, while in previous multi-parameter pumping schemes it caused unwanted and less controllable currents. In this paper we demonstrate experimentally the constructive and destructive role of non-adiabaticity by analysing the pumping current over a broad frequency range.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-07-13 |