Fig. 2: Structural properties of the interface. | Nature Communications

Fig. 2: Structural properties of the interface.

From: Semiconductor to metal transition in two-dimensional gold and its van der Waals heterostack with graphene

Fig. 2

Core level spectra acquired on a Au-intercalated monolayer of epitaxial graphene on SiC(0001) of a Au 4f fitted with a single Voigt doublet, b Si 2p fitted with two Voigt doublets. The photon energies are indicated in the panels. c μLEED pattern recorded at 122 eV on Au-intercalated graphene. The inset highlights the (13 × 13) pattern observed around the (00) spot. d STM topography image over a (5.2 × 5.2) nm2 region. The (13 × 13) moiré unit cell is indicated as a cyan diamond. Image recorded at Usample = 100 mV and Itunnel = 85 pA. Scale-bar 1 nm. e Ball-and-stick model of the gold atoms intercalated between graphene and SiC(0001). Side view and, on the right side, top view showing the (13 × 13) supercell.

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