Figure 3: Hybridization of topological Dirac-cone and Rashba states.
From: Topological proximity effect in a topological insulator hybrid
(a,b) ARPES intensity and second-derivative intensity plots of the MDCs, respectively, for 1BL Bi/TlBiSe2 hybrid around the 
point obtained with the He-I photons. Black dashed curves in a are guides to the eyes to trace the X-shaped band. White arrow indicates the top of the dispersion for this band. The Bi bands in b are more clearly resolved than those in Fig. 2a due to the difference in the derivative variables (that is, d2A/dk2 versus d2A/dE2), and not due to the difference in the substrates (TlBiS2 versus TlBiSe2). (c–e) Second-derivative intensity plots obtained with the Xe-I photons for 1BL Bi/TlBiSe2 hybrid, pristine TlBiSe2 and 1BL Bi/TlBiS2 hybrid, respectively. (f) Experimental band dispersions extracted from the peak positions of the MDCs for b–e.
