Beyond the Linearity of Current-Voltage Characteristics in Multiwalled Carbon Nanotubes

TL;DR

This paper investigates the nonlinear and non-local electron transport properties of multi-walled carbon nanotubes, revealing complex behaviors that depend on bias voltage and structural parameters.

Contribution

It provides new insights into the non-linear and non-local transport phenomena in multi-walled carbon nanotubes through detailed measurements.

Findings

Local I-V characteristics are linear.

Non-local conductance becomes highly non-linear and can be negative.

Transport depends on elastic length, number of shells, and conducting modes.

Abstract

We present local and non-local electron transport measurements on individual multi-wall nanotubes for bias voltage between 0 and about 4 V. Local current-voltage characteristics are quite linear. In contrast, non-local measurements are highly non-linear; the differential non-local conductance can even become negative in the high-bias regime. We discuss the relationship between these results and transport parameters such as the elastic length, the number of current carrying shells, and the number of conducting modes.