Figure 4: Topological Fermi arc surface states in TaAs.
From: A Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class
(a) The (001) surface states on the top surface of TaAs. (b) The same as panel a but on the bottom surface. The black and white circles denote the Weyl points, the shaded regions represent the spectral weight of some additional bulk bands near the surface region, whereas the sharp, red or blue curves show the surface states. (c,d) Schematics of the surface Fermi surfaces for the top and the bottom surfaces. (e) A close-up of the band structure on both the top and the bottom surfaces near the 
point, as indicated by the orange squares in panels a and b. (f–h) Energy dispersions of the electronic structure along three momentum space cuts, as noted in panel e.
