Figure 2
From: Does the Dirac Cone Exist in Silicene on Metal Substrates?
Band structures of epitaxial (√3×√3) silicene on various metal surfaces.
The Dirac point is folded at the Γ point. The Fermi level is set to zero. The red color in (a–b) and (d–f) indicates the states contributed by the Si atoms and the green, blue and magenta colors in (c) indicate the states contributed by s, px and py and pz orbitals of the Si atoms, respectively. The thickness of these colors is proportional to the Si atom character. The inset in (f) is the electron density at the Γ point inside the black square and the yellow and silver balls are Si and Cu atoms, respectively.
