Correlated transport and non-Fermi liquid behavior in single-wall carbon nanotubes

TL;DR

This paper develops a low-energy theoretical model for single-wall carbon nanotubes incorporating electron-electron Coulomb interactions, revealing non-Fermi liquid behavior with implications for magnetic, conductance, and impurity phenomena.

Contribution

It introduces a coupled fermion chain model for nanotubes and analyzes non-Fermi liquid effects using advanced theoretical techniques.

Findings

Breakdown of Fermi liquid theory in nanotubes

Prediction of magnetic instabilities

Anomalous conductance behaviors

Abstract

We derive the effective low-energy theory for single-wall carbon nanotubes including the Coulomb interactions among electrons. The generic model found here consists of two spin-1/2 fermion chains which are coupled by the interaction. We analyze the theory using bosonization, renormalization-group techniques, and Majorana refermionization. Several experimentally relevant consequences of the breakdown of Fermi liquid theory observed here are discussed in detail, e.g., magnetic instabilities, anomalous conductance laws, and impurity screening profiles.