Temperature dependent phonon renormalization in metallic nanotubes

TL;DR

This paper investigates how the Raman spectra of metallic and semiconducting nanotubes change with temperature, revealing that phonon renormalization in metallic nanotubes is driven by electronic temperature variations.

Contribution

It introduces a model incorporating non-adiabatic effects to explain temperature-dependent phonon renormalization in metallic nanotubes.

Findings

Temperature affects Raman spectra differently in metallic and semiconducting nanotubes.

Phonon re-normalization in metallic nanotubes is linked to electronic temperature changes.

Non-adiabatic contributions are essential for modeling phonon behavior at different temperatures.

Abstract

We measure the temperature dependence of the Raman spectra of metallic and semiconducting nanotubes. We show that the different trend in metallic tubes is due to phonon re-normalization induced by the variation in electronic temperature, which is modeled including non-adiabatic contributions to account for the dynamic, time dependent nature