Premium
Direct Observation of Dirac Cone in Multilayer Silicene Intercalation Compound CaSi 2
Author(s) -
Noguchi Eiichi,
Sugawara Katsuaki,
Yaokawa Ritsuko,
Hitosugi Taro,
Nakano Hideyuki,
Takahashi Takashi
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201403077
Subject(s) - silicene , graphene , materials science , intercalation (chemistry) , dirac (video compression format) , massless particle , fermi level , condensed matter physics , electron , nanotechnology , physics , quantum mechanics , neutrino
Calcium‐intercalated multilayer silicene CaSi 2 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.