Flat zigzag silicene nanoribbon with be bridge

Masae Takahashi

    Research output: Contribution to journalArticlepeer-review


    The emergence of flat one- and two-dimensional materials, such as graphene and its nanoribbons, has promoted the rapid advance of the current nanotechnology. Silicene, a silicon analogue of graphene, has the great advantage of its compatibility with the present industrial processes based on silicon nanotechnology. The most significant issue for silicene is instability in the air due to the nonplanar puckered (buckled) structure. Another critical problem is that silicene is usually synthesized by epitaxial growth on a substrate, which strongly affects the π conjugated system of silicene. The fabrication of free-standing silicene with a planar configuration has long been pursued. Here, we report the strategy and design to realize the flat zigzag silicene nanoribbon. We theoretically investigated the stability of various silicene nanoribbons with substituents at the zigzag edges and found that zigzag silicene nanoribbons with beryllium (Be) bridges are very stable in a planar configuration. The obtained zigzag silicene nanoribbon has an indirect negative band gap and is nonmagnetic unlike the magnetic buckled silicene nanoribbons with zigzag edges. The linearly dispersive behavior of the π and π∗ bands associated with the out-of-plane 3psi and 2pBe orbitals is clearly observed, showing the existence of a Dirac point slightly above the Fermi level. We also observed that spin.orbit coupling induces a gap opening at the Dirac point.

    Original languageEnglish
    Pages (from-to)12099-12104
    Number of pages6
    JournalACS Omega
    Issue number18
    Publication statusPublished - 2021 May 11

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)


    Dive into the research topics of 'Flat zigzag silicene nanoribbon with be bridge'. Together they form a unique fingerprint.

    Cite this