Figure 1: Giant spin–orbit splitting Δso of the graphene π band.
From: Giant Rashba splitting in graphene due to hybridization with gold
(a) Angle-resolved photoemission near the 
point of the graphene Brillouin zone of graphene/Au/Ni(111). Crosses indicate where the Dirac cone of the graphene π-states is probed by (b–e) spin- and angle-resolved photoemission spectra (hν=62 eV). Blue and red lines at panels (b–e) are spin-up and spin-down spectra. k|| is an in-plane component of the wave vector. The spin splitting reverses with the sign of k||. At panels (a,b), the directions in the graphene Brillouin zone where corresponding measurements were done are shown in insets.
