Interplay of Aharonov-Bohm, chirality, and aspect ratio effects in the axial conductance of a nanotube

Abstract

A magnetic flux applied along the axis of a nanotube can counteract the effect of the tube chirality and dramatically affect its conductance, leading to a way to determine the chirality of a nanotube. The effect of the applied flux is strongest in the long tube limit where the conductance is (i) either a sequence of sharp $4e^2/h$ height peaks located at integer (in units of the flux quantum) values of the flux (for an armchair tube) or (ii) a periodic sequence of pairs of $2e^2/h$ height peaks for a chiral tube, with the spacing determined by the chirality. In the short tube limit the conductance takes on the value that gives the universal conductivity of an undoped graphene sheet, with a small amplitude modulation periodic in the flux.

5 pages, 2 figures, version to be published in Phys. Rev. B

References in corpus (6)

• The electronic properties of graphene
• Electronic States of Graphene Nanoribbons
• Quantum-limited shot noise in graphene
• Conformal mapping and shot noise in graphene
• Magnetoconductance of the Corbino disk in graphene
• Aharonov-Bohm effect in undoped graphene: Magnetotransport via evanescent waves

Cited by in corpus (4)

• Trigonal warping, pseudodiffusive transport, and finite-system version of the Lifshitz transition in magnetoconductance of bilayer-graphene Corbino disks
• Quantum-limited shot noise and quantum interference in graphene based Corbino disk
• Quantum Transport Straintronics and Mechanical Aharonov-Bohm Effect in Quasi-metallic SWCNTs
• Strain-induced Aharonov-Bohm effect at nanoscale and ground state of a carbon nanotube with zigzag edges