Fig. 4
From: Atomic mechanism of strong interactions at the graphene/sapphire interface
Interlayer relaxation of α-Al2O3 in percent of the corresponding bulk spacings. The relaxation from the first layer (Al) to the second layer (O) is −(35.3 ± 8.2)%. The DFT calculation and previous results are also plotted for comparison. The error bar of experimental relaxation is calculated from the SD of bond length
