2018/01/09 by Ji-Huan Guan, Yan-Yang Zhang, Wei-Er Lu +2 · 3 citations
Materials Science · Physics and Astronomy · #2D Materials and Applications #Amplitude #Bound state #Dirac (video compression format) #Electron #Graphene research and applications #Lattice (music) #Oscillation (cell signaling) #Quantum tunnelling #Scattering #Semimetal #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1088/1361-648x/aab8dc
published in Journal of Physics Condensed Matter 30(18), 185402 (IOP Publishing) · 8 Figures
arxiv created 2018/01/09 · openalex created_date 2018/01/26 · openalex publication_date 2018/03/22 · arxiv updated 2018/05/09 · openalex updated_date 2026/08/08
We theoretically investigate the barrier tunneling in the 3D model of the hyperhoneycomb lattice, which is a nodal-line semimetal with a Dirac loop at zero energy. In the presence of a rectangular potential, the scattering amplitudes for different injecting states around the nodal loop are calculated, by using analytical treatments of the effective model, as well as numerical simulations of the tight binding model. In the low energy regime, states with remarkable transmissions are only concentrated in a small range around the loop plane. When the momentum of the injecting electron is coplanar with the nodal loop, nearly perfect transmissions can occur for a large range of injecting azimuthal angles if the potential is not high. For higher potential energies, the transmission shows a resonant oscillation with the potential, but still with peaks being perfect transmissions that do not decay with the potential width. These strikingly robust transports of the loop-nodal semimetal can be approximately explained by a momentum dependent Dirac Hamiltonian.