Figure 3: Observation of the metallic surface state and TSS on LuPtBi (111) surface.
From: Observation of unusual topological surface states in half-Heusler compounds LnPtBi (Ln=Lu, Y)
(a,b) Calculated band structures of Bi-terminated LuPtBi (111) surface. (a) Result from a slab model calculation, in which the size of filled circles represent the projection to the Bi-terminated surface. Both topologically non-trivial surface state and metallic surface states are captured. (b) Results from a semi-infinite surface that is terminated by Bi. Only topologically non-trivial surface state is revealed by the calculation. (c,d) Photoemission intensity plot (c) and its second-derivative 
plot (d) along the high symmetry 
–
–
directions. (e,f) Photoemission intensity plot (e) and its second-derivative 
plot (f) along the high symmetry 
–
directions. SS, topologically trivial metallic surface state due to the dangling bonds on sample surface. TSS, topologically non-trivial surface state. All data were taken with 65 eV photons.
