Pressure-induced transition in magnetoresistance of single-walled carbon nanotubes.
We applied hydrostatic pressure (up to 10 GPa) to single-walled carbon nanotube bundles at low temperature (down to 2 K) to measure their magnetoresistance (MR) in a field up to 12 T. We found a pressure-induced transition in MR from positive to negative in the high-field regime. The onset of the transition occurs at approximately 1.5 GPa, which correlates closely with the tube shape transitions. The characteristics of the high-pressure MR are consistent with a model of pressure-induced two-dimensional weak localization.
Cai
J Z
JZ
Institute of Physics, Chinese Academy of Sciences, Beijing 10080, China.
Lu
L
L
Kong
W J
WJ
Zhu
H W
HW
Zhang
C
C
Wei
B Q
BQ
Wu
D H
DH
Liu
Feng
F