Figure 1
From: Role of helical edge modes in the chiral quantum anomalous Hall state
Two and three terminal QAH bar: Topological chiral QAH edge mode is shown by solid black line, and quasi-helical QSH edge modes are shown by colored dashed line (red for spin up, blue for spin down). Trivial chiral QAH edge mode is shown by black dashed line. Intra edge back scattering is shown by arrows between the edge modes. Top panel: Two terminal QAH bar: (a) single topological QAH edge mode, (b) single topological QAH edge mode with quasi-helical QSH edge modes and (c) single trivial QAH edge mode with quasi-helical QSH edge modes, Bottom panel: Three terminal QAH bar: (d) single topological QAH edge mode, (e) single topological QAH edge mode with quasi-helical QSH edge modes and (f) single trivial QAH edge mode with quasi-helical QSH edge modes.
