Direct Observation of Dirac Cone in Multilayer Silicene Intercalation Compound CaSi2

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...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2015-02, Vol.27 (5), p.856-860
Main Authors: Noguchi, Eiichi, Sugawara, Katsuaki, Yaokawa, Ritsuko, Hitosugi, Taro, Nakano, Hideyuki, Takahashi, Takashi
Format: Article
Language:English
Subjects:
angle-resolved photoemission spectroscopy (ARPES)
dirac cone
fermi surface
intercalation
silicene
Online Access:Get full text
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Summary: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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201403077