Fig. 2: Topological and trivial domain wall states in coupled dimer chains.
From: Topological and trivial domain wall states in engineered atomic chains
a–c Atomic configurations and corresponding energy spectra of domain walls: a, b AA → AB and c AA → BA. The atomic configurations in a and b have the same domain walls as Fig. 1a, b, respectively. Red dashed rectangles indicate the difference on the upper chains between a and b. Red, black, and gray dots in the energy spectra represent topological, trivial domain wall states, and bulk states, respectively. d–f Simulated local density of states (LDOS) maps of a–c at the energy levels indicated by black arrows in a–c. Black (white) denotes the highest (lowest) LDOS.
