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

Schröer, D. M.; Hüttel, A. K.; Eberl, K.; Ludwig, S.; Kiselev, M. N.; Altshuler, B. L.

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

Authors

Description

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.