Enhanced current quantization in high frequency electron pumps in a perpendicular magnetic field

TL;DR

This paper reports experimental improvements in high-frequency electron pumps' quantization accuracy in a GaAs/AlGaAs quantum dot system under a perpendicular magnetic field, highlighting enhanced plateau robustness and quantization precision.

Contribution

It demonstrates that applying a perpendicular magnetic field improves the robustness and accuracy of quantized charge pumping in high-frequency quantum dot devices.

Findings

Quantized current plateaus are affected by magnetic field changes.

Magnetic field enhances the robustness of quantization.

Improvements in quantization accuracy are observed with B field.

Abstract

We present experimental results of high frequency quantized charge pumping through a quantum dot formed by the electric field arising from applied voltages in a GaAs/AlGaAs system in the presence of a perpendicular magnetic field B. Clear changes are observed in the quantized current plateaus as a function of applied magnetic field. We report on the robustness in the length of the quantized plateaus and improvements in the quantization as a result of the applied B field.