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

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

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.

Original languageEnglish
Article number105019
JournalNew Journal of Physics
Volume16
DOIs
StatePublished - 24 Oct 2014

Keywords

  • Boron nitride
  • DFT calculation
  • Silicone

Fingerprint Dive into the research topics of 'Electronic decoupling by h-BN layer between silicene and Cu(111): A DFT-based analysis'. Together they form a unique fingerprint.

  • Cite this