Fig. 7: Topological surface state.

a Band dispersion of Ba2NiReO6 on the projected (001) surface. b BZs of bulk and (001) surfaces with high-symmetry points of the fcc structure.
a Band dispersion of Ba2NiReO6 on the projected (001) surface. b BZs of bulk and (001) surfaces with high-symmetry points of the fcc structure.