2010/11/16 by Jelena Klinovaja, Manuel Schmidt, Manuel J. Schmidt +2 · 1 citation
Materials Science · Physics and Astronomy · #Graphene research and applications #Quantum and electron transport phenomena #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.106.156809
published as Phys. Rev. Lett. 106, 156809 (2011)
arxiv created 2010/11/16 · openalex publication_date 2011/04/15 · arxiv updated 2011/11/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Helical modes, conducting opposite spins in opposite directions, are shown to exist in metallic armchair nanotubes in an all-electric setup. This is a consequence of the interplay between spin-orbit interaction and strong electric fields. The helical regime can also be obtained in chiral metallic nanotubes by applying an additional magnetic field. In particular, it is possible to obtain helical modes at one of the two Dirac points only, while the other one remains gapped. Starting from a tight-binding model we derive the effective low-energy Hamiltonian and the resulting spectrum.