Fractional quantum conductance in carbon nanotubes
Using a scattering technique based on a parametrized linear combination of atomic orbitals Hamiltonian, we calculate the ballistic quantum conductance of multiwall carbon nanotubes. We find that interwall interactions not only block some of the quantum conductance channels, but also redistribute the current nonuniformly over individual tubes across the structure. Our results provide a natural explanation for the unexpected integer and noninteger conductance values reported for multiwall nanotubes by Stefan Frank et al. [Stefan Frank et al., Science 280, 1744 (1998)].
Sanvito
S
School of Physics and Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom and DERA, Electronics Sector, Malvern, Worcestershire WR14 3PS, United Kingdom and Department of Physics and Astronomy and Center for Fundamental Mater.
Kwon
YK
Tomanek
D
Lambert
CJ