Non-adiabatic pumping of single electrons affected by magnetic fields
Abstract
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.
Keywords
Cite
@article{arxiv.0909.2778,
title = {Non-adiabatic pumping of single electrons affected by magnetic fields},
author = {Christoph Leicht and Bernd Kaestner and Vyacheslavs Kashcheyevs and Philipp Mirovsky and Thomas Weimann and Klaus Pierz and Hans-Werner Schumacher},
journal= {arXiv preprint arXiv:0909.2778},
year = {2010}
}
Comments
This article has been submitted to Physica E