Superconductivity in bundles of a mixture of doped carbon nanotubes

TL;DR

This paper investigates how the mixture of metallic and semiconducting carbon nanotubes in bundles affects their superconducting properties, including the order parameter and critical temperature, using an inhomogeneous Bogoliubov-de Gennes formalism.

Contribution

It introduces a detailed theoretical analysis of superconductivity in mixed nanotube bundles considering inhomogeneity and varying compositions.

Findings

Superconducting order parameter varies with the fraction of semiconducting nanotubes.

Critical transition temperature depends on the mixture ratio.

Inhomogeneous formalism captures effects of mixture composition on superconductivity.

Abstract

Using inhomogeneous Bogoliubov-de Gennes formalism we study superconducting properties of bundles of single wall carbon nanotubes, consisting of a mixture of metallic and semiconducting nanotubes, having different critical transition temperatures. We investigate how the averaged superconducting order parameter and the critical transition temperature depend on the fraction of semiconducting carbon nanotubes in the bundle.