Direct observation of Dirac cone in multilayer silicene intercalation compound CaSi2.
basic_science · Level V
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- Record sourced from PubMed, PMID 25502913.
- Also identified by DOI 10.1002/adma.201403077.
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Abstract
Calcium-intercalated multilayer silicene CaSi2 exhibits a massless Dirac-cone π-electron-band dispersion like graphene, while the Dirac point is about 2 eV away from the Fermi level due to diiimide-based charge transfer from the Ca atoms to the silicene layers. This indicates that the graphene-like electronic structure with a massless Dirac cone is stably formed in the metal-intercalated multilayer silicene.