Figure 2
From: Domain wall of a ferromagnet on a three-dimensional topological insulator
The energy dispersions of the bulk states and edge modes for (a), (a’) J3 = 0 and (b), (b’) J3 = J0.
The edge mode appears inside the bulk band gap. The dispersion is almost independent of ϕ, i.e., the type of domain wall, for J3 = 0 (a), (a’), while it is sensitive when J3 = J0 (b), (b’). Probability distribution of the zero-energy wave function for ky = 0 for (c) J3 = 0, (d) J3 = J0. The dotted curve in (c) is given by Jackiw—Rebbi solution Eq. (12) in the text.
