Paraconductivity in Carbon Nanotubes

TL;DR

This paper calculates the paraconductivity in carbon nanotubes above the superconducting transition, analyzing its dependence on radius, temperature, and magnetic field, and compares results with experimental data.

Contribution

It provides a theoretical analysis of paraconductivity in carbon nanotubes, considering various structural types and external conditions, which was not previously detailed.

Findings

Paraconductivity varies with tube radius, temperature, and magnetic field.

Results align qualitatively with experimental observations of fluctuations above Tc.

Application to different nanotube structures demonstrates broad relevance.

Abstract

We report the calculation of paraconductivity in carbon nanotubes above the superconducting transition temperature. The complex behavior of paraconductivity depending upon the tube radius, temperature and magnetic field strength is analyzed. The results are qualitatively compared with recent experimental observations in carbon nanotubes of an inherent transition to the superconducting state and pronounced thermodynamic fluctuations above $T_{c}$. The application of our results to single-wall and multi-wall carbon nanotubes as well as ropes of nanotubes is discussed.