Aharonov-Bohm effect in circular carbon nanotubes

TL;DR

This paper investigates the Aharonov-Bohm effect in circular carbon nanotubes, analyzing how electron interactions influence conductance patterns under magnetic fields and gate voltages, revealing electron correlation effects.

Contribution

It provides a detailed analysis of electron interference and conductance resonances in toroidal carbon nanotubes, linking interaction parameters to observable transport properties.

Findings

Conductance exhibits resonant features modulated by magnetic field and gate voltage.

Interaction parameter determines the conductance pattern and can be validated through transport exponents.

Electron correlations manifest in the coordinate dependence of conductance.

Abstract

We study the interference of interacting electrons in toroidal single-wall carbon nanotubes coupled to metallic electrodes by tunnel junctions. The dc conductance shows resonant features as a function of the gate voltage and the magnetic field. The conductance pattern is determined by the interaction parameter, which in turn can be cross-checked against the exponents governing the transport at high temperatures. The coordinate dependence of the conductance reflects electron correlations in one-dimensional space.