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

    Research output: Contribution to journalArticlepeer-review

    338 Citations (Scopus)

    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
    Publication statusPublished - 2013 Feb 11

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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