Figure 2: Graphene on Ni₃Al(111).

(a) (bottom) C1s core level photoemission spectra acquired at different exposures during ethylene CVD at 950 K. (middle) High-resolution C1s core level spectrum measured at room temperature after Gr growth. The fit (black curve) and the C₀ (red) and C₁ (yellow) components are shown superimposed to the experimental data (grey circles). (top) Simulated C1s photoemission spectrum (red line) obtained from the DFT calculated binding energies for the top-fcc structure. (b) (bottom) Al2p core level photoemission spectra acquired at different exposures during ethylene uptake at 950 K. (top) High-resolution Al2p photoemission spectrum measured at room temperature after Gr growth. The fit (black curve) is shown superimposed to the experimental data (grey circles), along with the bulk (dark/light grey) and interface (dark/light green) components for the 2p_3/2 and 2p_1/2 sublevels. The Al2p spectrum obtained for the clean surface (red line) is plotted, after proper normalization, as a reference. (c) LEED pattern for the Gr/Ni₃Al(111) system measured at 150 eV. (d) Top and side views for the top-fcc Gr/Ni₃Al(111) structure. (e) ARPES measurement of the Gr/Ni₃Al(111) energy band dispersion along the K–M–K′ direction in the reciprocal space and (f) constant energy surfaces at the Dirac point energy (left) and at the Fermi level (right). (g) DFT-calculated Gr energy band dispersion along the M–K direction for the top-fcc structure. The bands with a participation of 50% or more of carbon orbitals are highlight using blue lines.