Extended Data Fig. 8: The high-C QAH effect observed in another group of magnetic TI/TI multilayer samples.
From: Tuning the Chern number in quantum anomalous Hall insulators
a–d, Dependence of ρxx (red) and ρyx (blue) on μ0H, measured at the charge-neutral point (Vg = Vg,0) and T = 25 mK. ρyx(0) displays the quantized values of 0.494h/e2, 0.307h/e2, 0.231h/e2 and 0.169h/e2 for the samples with C = 2, 3, 4 and 5, respectively. The corresponding ρxx(0) values are 0.010h/e2, 0.050h/e2, 0.039h/e2 and 0.087h/e2. Vg,0 values for the four samples are +15 V (C = 2), −3 V (C = 3), −15 V (C = 4) and +5 V (C = 5). e–h, Dependence of ρyx(0) (blue squares) and ρxx(0) (red circles) on gate voltage (Vg − Vg,0) for the C = 2–5 samples. All measurements were taken at T = 25 mK and μ0H = 0 T after magnetic training.
