  Electrical transport through single-walled carbon nanotubes (SWNTs) is
investigated by using the nearest-neighbor tight-binding model coupled with two
electron reservoirs. When the SWNT-electrode coupling is not axially symmetric,
asymmetric resonance peaks are found in the conductance and are considered to
be due to the interference between two transport channels. These Fano
resonances are sensitive to the coupling with electrodes. When the coupling is
axially symmetric, no asymmetric resonance peaks are observed.
