Figure 2
From: Role of helical edge modes in the chiral quantum anomalous Hall state
Four terminal quantum anomalous Hall bar showing chiral QAH and quasi-helical QSH edge modes. (a) Topological QAH edge mode with disorder at probes 2 and 4: R2, T2 and R4, T4 represent the reflection and transmission probability of edge modes from and into contact 2 and 4 respectively, (b) Topological QAH edge mode with quasi-helical edge modes: Disordered probes 2 and 4, (c) Trivial QAH edge mode with quasi-helical edge modes: Disordered probes 2 and 4.
