Fig. 3: Measurement of the SOI.
a, Schematic of the DQD charge stability diagram around the (1, 1)–(0, 2) interdot charge transition with voltage pulse sequence EISPM overlaid (see Methods). b, The pulse sequence shown as a function of time. The dashed lines indicate longer durations. c, Energy diagram showing the dependence of the two-electron spin states, singlet \(\left|\text{S}\right\rangle\) and triplet \(\left|\text{T}\right\rangle\), as a function of detuning ε with respect to the interdot tunnel-coupling tc. d, \(\left|\text{S}\right\rangle\)–\(\left|\text{T}_{0}\right\rangle\) oscillations as a function of duration τP and detuning at point P, ϵP, in the pulse sequence (applied magnetic field B = 250 mT and in-plane magnetic field orientation ϕB = 235°). e, \(\left|\text{S}\right\rangle\)–\(\left|\text{T}_{0}\right\rangle\) oscillation frequency dependence as a function of ϕB, measured as changes in rf phase with respect to a global maximal phase Φmax (a fixed detuning of εP = 0.926 meV is used). The oscillation frequencies were obtained from a Fourier analysis. f, The SOI component of the extracted frequencies, ΔgμBB/h, was fitted (line) using the model described in equation (2). Here Δg is the difference in g factors between QDs, μB is the Bohr magneton, B is the applied magnetic field and h is Planck’s constant. The shaded area shows the propagated error from the ±1 standard deviation of the fitted parameters.
