Theoretical Studies of Quantum Interference in Electronic Transport Through Carbon Nanotubes

TL;DR

This paper presents theoretical analysis of quantum interference effects in electronic transport through carbon nanotubes, highlighting conductance contributions, spin-dependent transport, and magnetoresistance oscillations.

Contribution

It introduces a detailed theoretical model accounting for multiple scattering, interference, and spin effects in carbon nanotube transport, including ferromagnetic contacts.

Findings

Conductance arises from multiple channels with interference effects.

Magnetoresistance exhibits large oscillations and can be negative.

Spin-dependent transport shows significant effects due to ferromagnetic electrodes.

Abstract

We performed studies of coherent electronic transport through a single walled carbon nanotube. In the calculations multiple scattering on the contacts and interference processes were taken into account. Conductance is a composition of contributions from different channels. We studied also spin--dependent transport in the system with ferromagnetic electrodes. The magnetoresistance is large and shows large oscillations, it can be even negative in some cases.