Modeling graphene-based nanoelectromechanical devices
Modeling graphene-based nanoelectromechanical devices
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DOI：
10.1103/physrevb.81.193404
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发表时间：
2010-05-15
影响因子：
3.7
通讯作者：
Cuniberti, G.
中科院分区：
文献类型：
--
作者：
Poetschke, M.;Rocha, C. G.;Cuniberti, G.
本文报道了石墨烯纳米带在外加机械应力作用下电荷输运特性的理论研究。机械力对带材电导率的影响强烈依赖于带材边缘的对称性，即之字形与扶手椅形。与之字形边缘纳米带相比，其对高应变变形保持鲁棒性，在扶手椅边缘结构中获得了拉伸诱导的金属-半导体转变。我们的结果指出，扶手椅边丝带因此更适合机电应用。
We report on a theoretical study of charge transport properties of graphene nanoribbons under external mechanical stress. The influence of mechanical forces on the ribbon conductance is shown to be strongly dependent on the ribbon edge symmetry, i.e., zigzag versus armchair. In contrast to zigzag-edge nanoribbons which remain robust against high strain deformations, a stretching-induced metal-semiconductor transition is obtained for armchair-edge configurations. Our results point out that armchair edge ribbons are consequently much better suited for electromechanical applications.