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- Computational study of the shift of the G band of double-walled carbon nanotubes due to interlayer interactions doi link

Auteur(s): Popov Valentin N., Levshov D., Sauvajol J.-L., Paillet M.

(Article) Publié: Physical Review B, vol. 97 p.165417 (2018)
Texte intégral en Openaccess : arxiv


Ref HAL: hal-01828151_v1
DOI: 10.1103/PhysRevB.97.165417
WoS: WOS:000429774800005
Exporter : BibTex | endNote
2 Citations
Résumé:

The interactions between the layers of double-walled carbon nanotubes induce a measurable shift of the G bands relative to the isolated layers. While experimental data on this shift in freestanding double-walled carbon nanotubes has been reported in the past several years, a comprehensive theoretical description of the observed shift is still lacking. The prediction of this shift is important for supporting the assignment of the measureddouble-walled nanotubes to particular nanotube types. Here, we report a computational study of the G-band shift as a function of the semiconducting inner layer radius and interlayer separation. We find that with increasing interlayer separation, the G band shift decreases, passes through zero and becomes negative, and further increases in absolute value for the wide range of considered inner layer radii. The theoretical predictions are shown to agree with the available experimental data within the experimental uncertainty.