Extended Data Fig. 6: Registration of different gate sweeps.
From: Direct visualization of electronic transport in a quantum anomalous Hall insulator
(a) dM/dVTG data with co-recorded measurements of Ryx versus VBG. Blue points mark the minimum in dM/dVTG for each position y along the channel. Blue curve is a 5th order polynomial fit to the points. (b) Same as (a) with for the dM/dVTG data presented in Fig. 3 and 4a for which Ryx was not co-recorded. (c) Comparison of the polynomial fits in (a) and (b). Based on the alignment of the polynomial fits, we use the same V0 for both dM/dV datasets. (d) Comparison of Ryx co-recorded with (a) and the current imaging data in Fig. 2b. Ryx measured with Ia.c. = 15 nA and co-recorded with magnetic imaging data (green) compared to Ryx measured with Ia.c. = 2.5 nA measured at each back gate voltage in the dM/dV data in figure (a) (blue). Vertical lines denote the gate voltages VOff where Ryx is maximized. A difference of 11.2 V is observed between the two data sets. The two values VOff are used for comparing data in Fig. 4a,b.
