Gate-voltage dependence of zero-bias anomalies in multiwall carbon nanotubes.
Temperature dependence of zero-bias conductance of the vanadium (V)/multiwall carbon nanotube (MWNT)/V structure is studied. As temperature is reduced, the conductance decreases with a functional form consistent with a power law. For the first time, we find that the exponent depends significantly on gate voltage. This exponent dependence cannot be explained by Luttinger-liquid theory for ballistic MWNTs. We interpret the obtained results within the framework of the nonconventional Coulomb blockade theory for strongly disordered MWNTs.
Kanda
Akinobu
A
Institute of Physics and Tsukuba Research Center for Interdisciplinary Material Science (TIMS), University of Tsukuba, Tsukuba 305-8571, Japan. kanda@lt.px.tsukuba.ac.jp
Tsukagoshi
Kazuhito
K
Aoyagi
Yoshinobu
Y
Ootuka
Youiti
Y