Conductance of the quantum dot with varying right gate and back gate voltage measured at bias voltage Vb = 200 μV. Coulomb resonances and modulations of their amplitude with different slopes are observed (dashed white lines). The extracted relative side gate back gate lever arms are , and . Lever arm (III) is attributed to resonances in the right constriction which are strongly tuned by the right side gate. In contrast resonances with lever arm (II) are only weakly affected by the right side gate and therefore attributed to states in the left constriction. The periodic resonances marked with (I) are attributed to resonances in the dot in agreement with the intermediate slope.
Güttinger et al. Nanoscale Research Letters 2011 6:253 doi:10.1186/1556-276X-6-253