Lattice Stability and Generation of Massive Dirac Fermions in α-Graphynes and Topological Line Defects in Monolayer BN

Abstract

Carbon allotropes named α-graphynes (αGy), with sp2 and sp3 bonded carbon atoms (Fig. 1), have been shown to display graphene-like electronic structures with the characteristic Dirac cones. Here, we discuss the lattice stability and gap opening in hydrogenated and oxydized forms of α-graphynes, and show that in both cases, the planar form is unstable… (More)

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