0000000000025878

AUTHOR

E. V. Kurganova

showing 2 related works from this author

Generation of energy selective excitations in quantum hall edge states

2011

We operate an on-demand source of single electrons in high perpendicular magnetic fields up to 30T, corresponding to a filling factor below 1/3. The device extracts and emits single charges at a tunable energy from and to a two-dimensional electron gas, brought into well defined integer and fractional quantum Hall (QH) states. It can therefore be used for sensitive electrical transport studies, e.g. of excitations and relaxation processes in QH edge states.

FOS: Physical sciences02 engineering and technologyElectronCorrelated Electron Systems / High Field Magnet Laboratory (HFML)Quantum Hall effect7. Clean energy01 natural sciences0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Materials ChemistryPerpendicularElectrical and Electronic EngineeringWell-defined010306 general physicsPhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsFilling factorRelaxation (NMR)021001 nanoscience & nanotechnologyCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsMagnetic fieldComputingMethodologies_DOCUMENTANDTEXTPROCESSING0210 nano-technologyFermi gas
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Constructive role of non-adiabaticity for quantized charge pumping

2010

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.

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)
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