Nonequilibrium Green's Function Approach to Phonon Transport in Defective Carbon Nanotubes

Abstract

We have developed a new theoretical formalism for phonon transport in nanostructures using the nonequilibrium phonon Green's function technique and have applied it to thermal conduction in defective carbon nanotubes. The universal quantization of low-temperature thermal conductance in carbon nanotubes can be observed even in the presence of local structural defects such as vacancies and Stone-Wales defects, since the long wavelength acoustic phonons are not scattered by local defects. At room temperature, however, thermal conductance is critically affected by defect scattering since incident phonons are scattered by localized phonons around the defects. We find a remarkable change from quantum to classical features for the thermal transport through defective CNTs with increasing temperature.

5 pages, 3 figures, accepted for publication in Phys. Rev. Lett

Cited by in corpus (15)

• Heat Transport in low-dimensional systems
• Quantum thermal transport in nanostructures
• Nonequilibrium Green's function approach to mesoscopic thermal transport
• Heat conduction in molecular transport junctions
• Electron- and phonon transport in silicon nanowires: an atomistic approach to thermoelectric properties
• Heat transport in harmonic lattices
• Quantum thermal transport from classical molecular dynamics
• Mesoscopic photon heat transistor
• Nonequilibrium Green's function method for phonon-phonon interaction and ballistic-diffusive thermal transport
• Coupled electron and phonon transport in one-dimensional atomic junctions
• Raman scattering in current carrying molecular junctions. A preliminary account
• Heat transport in ordered harmonic lattices
• Dimensional crossover of thermal conductance in nanowires
• Single-mode phonon transmission in symmetry broken carbon nanotubes
• Quantum phonon transport of molecular junctions amide-linked with carbon nanotubes: a first-principle study