Detailed studies of Na intercalation on furnace-grown graphene on 6H-SiC(0001)

Right figure: Electron reflectivity curves extracted from the 2 ML areas of the initial graphene surface in Fig. 1(a). Reflectivity curve obtained after Na deposition in Fig. 1(b), and in Fig. 1(c) after annealing at 100 °C and 240 °C, respectively.148