Moiré-Induced Vibrational Coupling in Double-Walled Carbon Nanotubes

Moiré patterns are additional, long-range periodicities in twisted crystalline bilayers. They known to fundamentally change the electronic states of layers, but similar effects on their mechanical and vibrational properties have not been discussed so far. Here we show that moiré potential shifts radial breathing mode double-walled carbon nanotubes (DWCNTs). The frequency is expected be proportional shift optical transition energies, which induced by patterns. To verify our model, performed resonance Raman scattering purified sorted semiconducting DWCNTs. We find up 14 cm–1 higher energy followed displacement energies 200 meV lower comparison single-walled tubes. how identify strong coupling condition DWCNTs from phonon frequencies construct a Kataura plot aid future experimental assignment.