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

Authors :: Wright, S. J.
Blumenthal, M. D.
Gumbs, Godfrey
Thorn, A. L.
Pepper, M.
Janssen, T. J. B. M.
Holmes, S. N.
Anderson, D.
Jones, G. A. C.
Nicoll, C. A.
Ritchie, D. A.
Source :: Phys. Rev. B 78, 233311 (2008)
Publication Year :: 2008
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.<br />Comment: 4 pages, 4 figures, accepted for publication in Phys. Rev. B

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