Electronic inter-tube transfer in double-wall carbon nanotubes with impurities

TL;DR

This study numerically investigates how impurities affect inter-tube conductance in double-wall carbon nanotubes, revealing a length-dependent conductance that peaks near the localization length but remains below quantum limits.

Contribution

It provides a detailed numerical analysis of impurity effects on inter-tube conductance, highlighting the length dependence and maximum conductance behavior.

Findings

Inter-tube conductance increases linearly with tube length.

Maximum conductance occurs near the localization length.

Maximum conductance is significantly below the quantum conductance.

Abstract

Inter-tube conductance of double-wall carbon nanotubes with impurities is numerically studied. Its length dependence for various impurities is scaled by a mean-free path. The inter-tube conductance exhibits drastic linear increase with the tube length and takes a maximum around at the localization length. The maximum conductance is much smaller than the conductance quantum $e^2/\pi\hbar$.