Figure 4
From: Does the Dirac Cone Exist in Silicene on Metal Substrates?
Band structures of epitaxial silicene on various metal substrates with K atoms intercalation: (a) (2×2) silicene on (√7×√7) Ag substrate, (b–d) (√3×√3) silicene on (2×2) Mg, (√7×√7) Cu and (√7×√7) Ir substrates, (e–f) K-intercalated (√3×√3) silicene with Cu and Ir substrates removed. The Fermi level is set to zero. The red color indicates the states contributed by the Si atoms and its thickness is proportional to the Si atom character. The green lines in (a) are the band structure of the epitaxial silicene with the intercalated K atoms and Ag substrate removed. The Dirac point in (b–d) is folded to the Γ point. Black squares indicate those states contributed by the π (π*) bands of silicene.
