Figure 2: Quantum phase transition of quantum anomalous Hall effect.
From: Metal-to-insulator switching in quantum anomalous Hall states
(a) Magnetic field-dependent σxy at different temperatures. Zero Hall plateaus at ±HC are developed between the two QAHE states up to 0.33 K. (b) Magnetic field-dependent σxx at different temperatures. Even when the film already deviates from the perfect QAHE state at T=0.33 K, both the zero σxy plateaus and double-peaked σxx still persist. (c) Schematic representation of the multi-___domain network formed during the magnetization reversal process. The upward yellow arrows and downward green arrows denote the up (ΔM>|m0|) and down (ΔM<-|m0|) magnetic domains, respectively. (d) Temperature-dependent transition slope S=(
)max extracted from a. When T<0.1 K, S∝T-κ follows the power low scaling behaviour with κ=0.22.
