6533b830fe1ef96bd1297070

RESEARCH PRODUCT

Non-adiabatic pumping of single electrons affected by magnetic fields

P. MirovskyChristoph LeichtThomas WeimannKlaus PierzBernd KaestnerVyacheslavs KashcheyevsH. W. Schumacher

subject

PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsFOS: Physical sciencesHeterojunction02 engineering and technologyElectronCondensed Matter::Mesoscopic Systems and Quantum Hall Effect021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsMagnetic fieldTunnel effectQuantum dotMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciences010306 general physics0210 nano-technologyAdiabatic processQuantum tunnellingVoltage

description

Non-adiabatic pumping of discrete charges, realized by a dynamical quantum dot in an AlGaAs/GaAs heterostructure, is studied under influence of a perpendicular magnetic field. Application of an oscillating voltage in the GHz-range to one of two top gates, crossing a narrow wire and confining a quantum dot, leads to quantized pumped current plateaus in the gate characteristics. The regime of pumping one single electron is traced back to the diverse tunneling processes into and out-of the dot. Extending the theory to multiple electrons allows to investigate conveniently the pumping characteristics in an applied magnetic field. In this way, a qualitatively different behavior between pumping even or odd numbers of electrons is extracted.

yearjournalcountryeditionlanguage
2009-09-15Physica E: Low-dimensional Systems and Nanostructures
https://doi.org/10.1016/j.physe.2009.11.109