Anomalous plateau formation and improved quantization in charge pumping under the application of a perpendicular magnetic field

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 $B$. Improved quantization and robustness in gate voltage are seen as $B$ is increased. Under application of even higher $B$ fields, the formation of anomalous plateaus in the pumped current are seen.