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Kondo effect in a one-electron double quantum dot: Oscillations of the Kondo current in a weak magnetic field

D. M. Schröer·A. K. Hüttel·K. Eberl·S. Ludwig·M. N. Kiselev·B. L. Altshuler
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Abstract

We present transport measurements of the Kondo effect in a double quantum dot charged with only one or two electrons, respectively. For the one electron case we observe a surprising quasi-periodic oscillation of the Kondo conductance as a function of a small perpendicular magnetic field |B| \lesssim 50mT. We discuss possible explanations of this effect and interpret it by means of a fine tuning of the energy mismatch of the single dot levels of the two quantum dots. The observed degree of control implies important consequences for applications in quantum information processing.

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D. M. Schröer, A. K. Hüttel, K. Eberl, S. Ludwig, M. N. Kiselev, B. L. Altshuler. 2006-11-27. Kondo effect in a one-electron double quantum dot: Oscillations of the Kondo current in a weak magnetic field. https://doi.org/10.1103/physrevb.74.233301

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