2016/11/06 by Fuming Xu, Zhizhou Yu, Yafei Ren +3
Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #Carbon nanotube #Carbon nanotube quantum dot #Coupling (piping) #Electron #Graphene #Graphene research and applications #Spectral line #Superlattice #Topological Materials and Phenomena #Transistor #Zigzag #cond-mat.mes-hall
paper · pdf · doi:10.1088/1367-2630/18/11/113011
published as New J. Phys. 18, 113011 (2016) · 10 pages, 11 figures
openalex publication_date 2016/11/06 · openalex created_date 2016/11/30 · arxiv created 2017/01/03 · arxiv updated 2017/01/04 · openalex updated_date 2026/08/06
We numerically investigate the electronic transport properties of graphene nanoribbons and carbon nanotubes with inter-valley coupling, e.g., in and superlattices. By taking the graphene superlattice as an example, we show that tailoring the bulk graphene superlattice results in rich structural configurations of nanoribbons and nanotubes. After studying the electronic characteristics of the corresponding armchair and zigzag nanoribbon geometries, we find that the linear bands of carbon nanotubes can lead to the Klein tunnelling-like phenomenon, i.e., electrons propagate along tubes without backscattering even in the presence of a barrier. Due to the coupling between K and valleys of pristine graphene by supercells, we propose a valley-field-effect transistor based on the armchair carbon nanotube, where the valley polarization of the current can be tuned by applying a gate voltage or varying the length of the armchair carbon nanotubes.