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| 单壁碳纳米管能带及其电子特性研究 | |
| 引用本文： | 托合提江,阿不都热苏力,艾尔克·扎克尔.单壁碳纳米管能带及其电子特性研究[J].光学与光电技术,2014,12(3):85-90. |
| 作者姓名： | 托合提江 阿不都热苏力 艾尔克·扎克尔 |
| 作者单位： | 托合提江:新疆大学物理科学与技术学院, 新疆 乌鲁木齐 830046 阿不都热苏力:新疆大学物理科学与技术学院, 新疆 乌鲁木齐 830046 艾尔克·扎克尔:新疆大学物理科学与技术学院, 新疆 乌鲁木齐 830046 |
| 基金项目： | 国家自然科学基金(11164030)资助项目 |
| 摘 要： | 从能带理论出发,采用电子紧束缚能量色散关系,推导锯齿,扶手椅和手性单壁碳纳米管(SWCNT)的电子能带结构表达式,指出单壁碳纳米管或为金属或为半导体的判据。结果表示:单壁碳纳米管的电子结构与其几何结构密切相关,如扶手椅型单壁碳纳米管是金属性的,而对其它类型的单壁碳纳米管是与碳纳米管的手性指数有关,只有手性指数n和m的差别等于3的倍数时,单壁碳纳米管是金属性的,否则会显出有带隙的半导体特性。这意味着单壁碳纳米管是由特殊的电子传输和光学性质,在纳米电子学领域具有巨大的潜在应用价值。 |
| 关 键 词： | 石墨烯 单壁碳纳米管 紧束缚近似方法 电子能带结构 手性指数 |
| 收稿时间： | 2013/12/11 |
Energy Band and Electronic Properties of Single Walled Carbon Nanotubes |
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| Institution: | Tuohetijiang, B Abdurixit ,A Aierken Z ( School of Physics and Technology Xinjiang University, Urumqi 830046, China ) |
| Abstract: | From the energy band theory, applying tight binding approximation for electron＇s energy dispersion, inferred the energy band structures of zigzag, armchair, and chiral single walled carbon nanotubes（SWCNT） are carried out, according to their chiral index. The metallic or semiconductive is classified. The results indicate that the electronic band structure of graphene nanotubes are closely related to their geometric structure. The armchair nanotubes are metallic, for other type car bon nanotubes depending on their chiral index, only index differences between n and m multiple of 3, then carbon nanotubes are metallic. Otherwise it shows semiconductive properties. The results indicate that graphene carbon nanotubes have uique elctron carrying capacity and optical property. It has potential application in nano electronics. |
| Keywords: | graphene single walled carbon nanotubes tight binding approximation electronic band structure chiral index |
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