Substrate-induced symmetry breaking in silicene

Chun-Liang Lin*, Ryuichi Arafune, Kazuaki Kawahara, Mao Kanno, Noriyuki Tsukahara, Emi Minamitani, Yousoo Kim, Maki Kawai, Noriaki Takagi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

322 Scopus citations

Abstract

We demonstrate that silicene, a 2D honeycomb lattice consisting of Si atoms, loses its Dirac fermion characteristics due to substrate-induced symmetry breaking when synthesized on the Ag(111) surface. No Landau level sequences appear in the tunneling spectra under a magnetic field, and density functional theory calculations show that the band structure is drastically modified by the hybridization between the Si and Ag atoms. This is the first direct example demonstrating the lack of Dirac fermions in a single layer honeycomb lattice due to significant symmetry breaking.

Original languageEnglish
Article number076801
JournalPhysical Review Letters
Volume110
Issue number7
DOIs
StatePublished - 11 Feb 2013

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