Figure 4

Dot conductance as a function of right gate and back gate voltage at a magnetic field of (a) 0 T and (b) 7 T. The spectrum is dominated by dot resonances marked with the solid line in (a) with a relative lever arm of (see also Figure 2). (b) At a magnetic field of 7 T a hexagon pattern with two characteristic slopes is observed. Their corresponding lever arms are attributed to the dot and origin around the right constriction.