Figure 2: Rashba spin-splitting of one-bilayer Bi on TlBiS2.
From: Topological proximity effect in a topological insulator hybrid
(a) Second-derivative intensity plot of the EDCs for 1BL Bi/TlBiS2 hybrid measured along the 
(ky) cut, together with the location of the k points (solid lines) where the spin-resolved ARPES measurements were performed (points A–C). White dots are the peak position of the MDCs estimated by numerical fittings, and dashed orange and blue curves are guides to the eyes to trace the band dispersion. LO, LI, SO and SI represent the large outer, large inner, small outer and small inner hole-like bands, respectively. The direction of the spin-polarization vector for each band is also indicated. (b) ARPES intensity mapping at EF in a 2D wave-vector plane obtained with the Xe-I photons for 1BL Bi/TlBiS2 hybrid; this intensity is obtained by integrating the spectra within ±10 meV of EF. Definitions of the up/down-spin vectors and the experimentally determined spin direction for each Fermi surface are also indicated. (c) Spin-resolved EDCs and corresponding energy dependence of the spin polarization at representative k points (A–C) shown in a.
