The Phonon Drag Effect in Single-Walled Carbon Nanotubes
V.W. Scarola, G.D. Mahan
TL;DR
This paper presents a theoretical calculation of the phonon drag effect on thermopower in single-walled carbon nanotubes using a variational approach to coupled electron-phonon equations, highlighting the impact of band scattering.
Contribution
It introduces a simple formula for phonon drag temperature dependence in metallic nanotubes and explores band scattering effects on phonon drag.
Findings
Phonon drag contributes significantly to thermopower in nanotubes.
Band scattering affects the phonon drag magnitude.
Derived a temperature-dependent formula for phonon drag in 1-D systems.
Abstract
A variational solution of the coupled electron-phonon Boltzmann equations is used to calculate the phonon drag contribution to the thermopower in a 1-D system. A simple formula is derived for the temperature dependence of the phonon drag in metallic, single-walled carbon nanotubes. Scattering between different electronic bands yields nonzero values for the phonon drag as the Fermi level varies.
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Taxonomy
TopicsCarbon Nanotubes in Composites · Thermal properties of materials · Smart Materials for Construction