0000000000025883

AUTHOR

Hyeonsik Cheong

showing 2 related works from this author

Formation and emission properties of single InGaAs/GaAs quantum dots and pairs grown by droplet epitaxy

2010

Trabajo presentado a la 30th International Conference on the Physics of Semiconductors, celebrada en Seul (Korea) del 25 al 30 de Julio de 2010.

Materials scienceCondensed matter physicsmedia_common.quotation_subjectNucleationPhysics::OpticsCharge (physics)EpitaxyMolecular physicsAsymmetryQuantum dotElectric fieldArea densityDiffusion (business)media_common
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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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