Persistent current and correlation effects in carbon nanotubes

TL;DR

This paper investigates persistent currents in interacting electrons within toroidal carbon nanotubes, revealing how topological excitations and exchange correlations influence the current's pattern and fine structure.

Contribution

It introduces a novel analysis of persistent currents in nanotubes using Haldane's topological excitations, highlighting the roles of interaction models and exchange correlations.

Findings

Persistent current pattern aligns with the constant interaction model.

Fine structure of the current is due to electronic exchange correlations.

Topological excitations significantly influence electron behavior in nanotubes.

Abstract

The persistent current of interacting electrons in toroidal single-wall carbon nanotubes is evaluated within Haldane's concept of topological excitations. The overall pattern of the persistent current corresponds to the constant interaction model, whereas the fine structure stems from the electronic exchange correlations.