2015/04/30 by Jing Li, Henrique Miranda, Henrique Pereira Coutada Miranda +6
Materials Science · Physics and Astronomy · #Band gap #Carbon Nanotubes in Composites #Carbon nanotube #Condensed matter physics #Electrical resistivity and conductivity #Electron mobility #Graphene #Graphene nanoribbons #Graphene research and applications #Materials science #Nanotechnology #Optoelectronics #Phonon #Physics #Thermal properties of materials #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.92.075414
published as Phys. Rev. B 92, 075414 (2015) · 12 pages
openalex publication_date 2015/08/11 · arxiv created 2015/08/25 · arxiv updated 2015/08/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Under which conditions do the electrical transport properties of one-dimensional (1D) carbon nanotubes (CNTs) and 2D graphene become equivalent? We have performed atomistic calculations of the phonon-limited electrical mobility in graphene and in a wide range of CNTs of different types to address this issue. The theoretical study is based on a tight-binding method and a force-constant model from which all possible electron-phonon couplings are computed. The electrical resistivity of graphene is found in very good agreement with experiments performed at high carrier density. A common methodology is applied to study the transition from one to two dimensions by considering CNTs with diameter up to 16 nm. It is found that the mobility in CNTs of increasing diameter converges to the same value, i.e., the mobility in graphene. This convergence is much faster at high temperature and high carrier density. For small-diameter CNTs, the mobility depends strongly on chirality, diameter, and the existence of a band gap.