Figure 2: Experimental bands superimposed with theoretical bands.
From: Creation of helical Dirac fermions by interfacing two gapped systems of ordinary fermions

(a) Bare 1QL Bi2Se3. (b) and (c) 1BL Bi (111) on 1QL Bi2Se3 along M-Γ-M and K-Γ-K directions, respectively. Green dashed lines are the theoretical bands. (d,e) High resolution ARPES spectra near the Dirac cone and corresponding MDC curves. Green dotted line marks the linearly dispersive bands that crossing at Dirac point at ~70 meV blew Fermi level. Note that the calculated bands are slightly different from Fig. 1 because different lattice parameter used.