Electronic Band Structure of Carbon Nanotubes with Kekule Structure
Nguyen Ngoc Hieu1**, Le Cong Nhan2
1Center of Research and Development, Duy Tan University, K7/25 Quang Trung, Da Nang, Viet Nam 2Department of Environmental Science, Saigon University, 273 An Duong Vuong, Ho Chi Minh city, Viet Nam
Abstract：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.
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2013, Vol. 30 
