Electronic Band Structure of Carbon Nanotubes with Kekule Structure

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（9）
• 页码范围: 97-100
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/9/096102

摘要

Electronic band structure of carbon nanotubes with the Kekule structure is studied by the tight-binding approximation.We give a complete geometrical approach to structural properties of carbon nanotubes with bond alternation,including chiral and achiral tubes.When the Kekule is introduced,all carbon nanotubes become semiconducting with a small band gap at the Fermi level.The band gap of the carbon nanotubes depends only on the difference between C-C bond lengths or the resonance integrals.