Thermal Einstein-de Haas Effect Induced by Chiral Phonons in Carbon Nanotubes

Abstract

We investigate the effects of chirality on phonon thermal transport in semiconducting chiral single-walled carbon nanotubes (SWCNTs) using lattice dynamics combined with Boltzmann transport theory. We find that transverse acoustic and optical phonon modes, which are degenerate in nonchiral zigzag and armchair SWCNTs, are split in chiral SWCNTs, giving rise to finite phonon angular momentum associated with circular motion of individual atoms. This angular momentum is most efficiently generated in small-diameter nanotubes with intermediate chiral angles. Consequently, chiral SWCNTs are predicted to undergo thermally induced rigid-body rotation with an experimentally observable angular velocity via the thermal Einstein-de Haas effect.

5pages, 5 figures

References in corpus (18)

• Thermal Conductance of an Individual Single-Wall Carbon Nanotube above Room Temperature
• Optimized Tersoff and Brenner empirical potential parameters for lattice dynamics and phonon thermal transport in carbon nanotubes and graphene
• Valley contrasting chiral phonons in monolayer hexagonal lattices
• Nonequilibrium Green's Function Approach to Phonon Transport in Defective Carbon Nanotubes
• Angular Momentum of Phonons and Einstein-de Haas Effect
• Universal Features of Quantized Thermal Conductance of Carbon Nanotubes
• Truly chiral phonons in α-HgS
• Chiral phonons probed by X rays
• Effects of mechanical rotation on spin currents
• Phonon Angular Momentum Induced by Temperature Gradient
• Chiral Phonons in Chiral Materials
• Chirality-induced Phonon Dispersion in a Noncentrosymmetric Micropolar Crystal
• Chirality-Induced Selectivity of Phonon Angular Momenta in Chiral Quartz Crystals
• Chiral phonons: circularly polarized Raman spectroscopy and $\text{ab initio}$ calculations in a chiral crystal tellurium
• Theory of Energy Dispersion of Chiral Phonon
• Observation of Phonon Angular Momentum
• Selective observation of enantiomeric chiral phonons in $\alpha$-quartz
• Single-mode phonon transmission in symmetry broken carbon nanotubes