Comment on article "Line of Dirac Nodes in Hyperhoneycomb Lattices"

Abstract

Recently, carbon hyperhoneycomb ($\mathcal{H}$-n) lattices have been proposed to be, through a one-$p$ orbital tight-binding (TB) model with nearest-neighbor (n.n.) hopping, a family of strong 3D topological insulators (K. Mullen, B. Uchoa and D. T. Glatzhofer, Phys. Rev. Lett. 115, 026403 (2015)) . In this Comment we show, through Density Functional Theory (DFT) and Extended Hückel Theory (EHT) calculations for the $\mathcal{H}$-0 lattice, that the TB Hamiltonian used by the authors is inadequate, invalidating the presented conclusions.

2 pages, 2 figures, submitteed to Phys. Rev. Lett

References in corpus (4)

• The SIESTA method for ab initio order-N materials simulation
• Efficient index handling of multidimensional periodic boundary conditions
• Line of Dirac Nodes in Hyper-Honeycomb Lattices
• Extended Huckel theory for bandstructure, chemistry and transport. I. Carbon Nanotubes

Cited by in corpus (1)

• Tunable two-dimensional Dirac nodal nets