| 扶手椅型石墨烯纳米带输运性质的应变调控——以微小应变作用为例 |
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| 引用本文： | 廖文虎,郭俊吉.扶手椅型石墨烯纳米带输运性质的应变调控——以微小应变作用为例[J].吉首大学学报(自然科学版),2012,33(6):33-36. |
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| 作者姓名： | 廖文虎 郭俊吉 |
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| 作者单位： | (吉首大学物理与机电工程学院，湖南 吉首 416000) |
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| 基金项目： | 国家自然科学基金资助项目，湖南省自然科学基金资助项目，吉首大学博士启动基金资助项目 |
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| 摘 要： | 采用非平衡格林函数方法和密度泛函理论的第一性原理，计算外加非轴向微小应变作用下扶手椅型石墨烯纳米带的电子能态密度和透射谱.结果表明，半导体型扶手椅石墨烯纳米带的电子透射系数和能态密度对外加非轴向应变十分敏感，金属型扶手椅石墨烯纳米带的带隙在微小应变下即可打开.
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| 关 键 词： | 扶手椅型石墨烯纳米带 非轴向应变 第一性原理计算 电子态密度 透射系数 |
Strain Manipulation for Transport Properties for Armchair-Edge Graphene Nanoribbons ——Under a Small Strain |
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| LIAO Wen-Hu,GUO Jun-Ji.Strain Manipulation for Transport Properties for Armchair-Edge Graphene Nanoribbons ——Under a Small Strain[J].Journal of Jishou University(Natural Science Edition),2012,33(6):33-36. |
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| Authors: | LIAO Wen-Hu GUO Jun-Ji |
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| Institution: | (College of Physics and Mechanical and Electrical Engineering,Jishou University,Jishou 416000,Hunan China) |
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| Abstract: | Electronic transmission coefficients and density of states for uniaxially small strained armchair-edge graphene nanoribbons (AGNRs) are demonstrated by the first-principle calculations based on nonequilibrium Green’s function method and density-functional-theorem.It is observed that the system density of states and transmission coefficients of semiconducting AGNRs are sensitive to the external uniaxially small strain,while the energy gaps of metallic AGNRs may be opened under a small strain. |
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| Keywords: | armchair-edge graphene nanoribbons uniaxial strain first-principles calculation electron den-sity of states transmission coefficients |
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