Figure 3
From: Three-waveform bidirectional pumping of single electrons with a silicon quantum dot
Bidirectional pumping.
(a) Pumped direct current as a function of the plunger dc voltage and the phase difference of plunger rf driving voltage with respect to the barrier left rf drive. Magenta and cyan color indicate the regions where I/ef = ±1 within 5%, i.e., where one electron is pumped per cycle in the positive and negative directions, respectively. The parameter values are the same as in Fig. 2(b) with the choice VBL = 0.814 V, VBR = 0.850 V, and ABR = 79 mV. (b) Absolute values of the cross sections along VPL in (a) at ϕBL-PL = 120° (blue) and 240° (red) with 95% confidence intervals indicated. (c) Cross section of the pumped current along ϕBL-PL at VPL = 0.823 V indicated by the green dashed line in (a).
