Збережено в:
| Автори: | , , , |
|---|---|
| Формат: | Preprint |
| Опубліковано: |
2010
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| Предмети: | |
| Онлайн доступ: | https://arxiv.org/abs/1002.1825 |
| Теги: |
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Зміст:
- We present a first-principles study of Peierls distortions in \emph{trans}-polyacetylene, polyacene, and armchair $(n,n)$ carbon nanotubes. Our findings suggest that the ground-state geometries of armchair $(n,n)$ carbon nanotubes, with $n$ up to 6, exhibit a Peierls distortion as it is found for \emph{trans}-polyactetylene. In contrast to previous studies in which no Peierls distortion is found with conventional local and semi-local density functionals, we use a hybrid functional whose exact-exchange admixture has been specifically optimized for the problem at hand.