Figure 4
From: Fermi-crossing Type-II Dirac fermions and topological surface states in NiTe2
(a) In-plane dispersion of TSS0 forming electron pockets labelled as ε and γ and (b) the non-dispersive behaviour of TSS0 surface state close to the Fermi level in the photon-energy dependence. (c) Fermi surface measured with horizontal polarization of light and photon energy, hν = 23 eV, which corresponds to the A-plane. The region under the red dotted box is magnified by a factor of 5 to show the electron pockets α (Band 2), ε and γ (TSS0) and the bulk bands. (Inset: calculated bulk Fermi surface consisting of the circular α electron pocket and bands forming hexagonal contour, in good agreement with measured data). (d) and (e) Slab calculation with projected spin components of the topological surface states. TSS2 shows finite <Sx> and <Sy> components normal to H′–A–H and L′–A–L direction, respectively. TSS0 has finite spin component <Sy> normal to L′–A–L (note that TSS0 is hybridized with bulk in all other regions of the plots, so no further conclusions about surface state spin texture can be made). Figures made using Igor29 and Adobe Illustrator30.
