Effect of Pressure on the Electrical Resistance of Individual Boron-Doped Carbon Nanotubes

The electrical resistance of an individual boron-doped multi-walled carbon nanotube was measured under high pressure up to 1.73 GPa. The resistance decreased drastically when pressure was applied. The temperature dependence of the resistance was explained by a variable range hopping transport model, and the dimensionality was observed to change from one to three dimensions with increasing pressure.