Electronic decoupling by h-BN layer between silicene and Cu(111): A DFT-based analysis

Mao Kanno*, Ryuichi Arafune, Chun-Liang Lin, Emi Minamitani, Maki Kawai, Noriaki Takagi


研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)


Geometric and electronic structures of silicene on Cu(111) covered with a monolayer of hexagonal boron nitride (h-BN) were investigated by ab initio density functional theory calculations. We found that a silicene with a regularly buckled configuration is stabilized on h-BN layer stacking commensurately to the Cu(111) substrate. The electronic band structure projected to Si 3pz orbital clearly shows a band crossing similar to a Dirac cone emerging in the band structure of freestanding buckled silicene. This is in contrast to the silicene on Cu(111), in which the Dirac fermion features disappear entirely due to the strong interactions at the interface. These examples demonstrate that the h-BN monolayer effectively prevents silicene from interacting with the underlying Cu(111) substrate and that the h-BN monolayer on Cu(111) is a promising candidate for use as a substrate on which to realize silicene hosting the Dirac fermion features.

期刊New Journal of Physics
出版狀態Published - 24 10月 2014


深入研究「Electronic decoupling by h-BN layer between silicene and Cu(111): A DFT-based analysis」主題。共同形成了獨特的指紋。