Figure 3 | Scientific Reports

Figure 3

From: Higher-order spin and charge dynamics in a quantum dot-lead hybrid system

Figure 3

(a) The observed singlet probability and 〈V sensor 〉 as a function of the interaction time at O2 [see Fig. 1(b)]. Red circles show the spin signal (left axis). The blue trace shows the charge signal (right axis). The red smooth curve is an exponential fit resulting in the relaxation time of 4.5 μs. The charge signal shows no relaxation. (b) Histogram of observed values of the charge sensor voltage V sensor (on the x axis), N(V sensor )/N tot , is plotted as a function of the interaction time (y axis). The peak corresponds to the (1,1) charge state. (c) Schematic of the spin relaxation by a second-order tunneling process. An electron of the QD1 is swapped with one in the lead in a single step. The spin state is changed even though the charge state is stable.

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