Bond Distortions in Armchair Type Single Wall Carbon Nanotubes

TL;DR

This study compares the energy band gap structure and bond distortions in armchair single wall carbon nanotubes using two models, revealing similar electronic properties but different bond length distortion behaviors.

Contribution

It introduces a modified SSH model that accounts for different bond types, providing new insights into bond distortions in nanotubes.

Findings

Both models yield the same energy band gap structure.

Bond length distortions differ characteristically between models.

Electronic properties remain consistent across models.

Abstract

The energy band gap structure and stability of (3,3) and (10,10) nanotubes have been comparatively investigated in the frameworks of the traditional form of the Su-Schrieffer-Heeger (SSH) model and a toy model including the contributions of bonds of different types to the SSH Hamiltonian differently. Both models give the same energy band gap structure but bond length distortions in different characters for the nanotubes.