Fig. 4: Hinge states and Fermi arcs.

a The projected admittances along kz axis. b Hinge-state dispersion connecting the projection of the Weyl points on kz axis. The red dots and the color map in a and b represent the theory and experimental hinge spectrum, respectively. c The numerical “Fermi arc” of the surface states at jn = 0.004082 Ω−1, connecting the projections of the Weyl points on kx-kz surface. d “Fermi arc” of the surface states at 835 kHz. The color map and the white circles represent the experimental and theoretical results, respectively.