6533b820fe1ef96bd1279253
RESEARCH PRODUCT
Quantized current source with mesoscopic feedback
Klaus PierzLukas FrickeFrank HohlsRolf J. HaugChristoph LeichtBernd KaestnerNiels UbbelohdeVyacheslavs KashcheyevsP. MirovskyHans Werner Schumachersubject
PhysicsMesoscopic physicsMesoscopic circuitCondensed Matter - Mesoscale and Nanoscale PhysicsDetectorFOS: Physical sciencesCharge (physics)02 engineering and technologyElectronCurrent source021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesSignalElectronic Optical and Magnetic MaterialsQuantum dotExcited stateMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesddc:530Dewey Decimal Classification::500 | Naturwissenschaften::530 | PhysikAtomic physics010306 general physics0210 nano-technologydescription
We study a mesoscopic circuit of two quantized current sources, realized by nonadiabatic single-electron pumps connected in series with a small micron-sized island in between. We find that quantum transport through the second pump can be locked onto the quantized current of the first one by a feedback due to charging of the mesoscopic island. This is confirmed by a measurement of the charge variation on the island using a nearby charge detector. Finally, the charge feedback signal clearly evidences loading into excited states of the dynamic quantum dot during single-electron pump operation. © 2011 American Physical Society.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-01 | Physical Review B |