Electron Transport in Disordered Graphene Nanoribbons
Electron Transport in Disordered Graphene Nanoribbons
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DOI：
10.1103/physrevlett.104.056801
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发表时间：
2010-02-05
影响因子：
8.6
通讯作者：
Kim, Philip
中科院分区：
文献类型：
--
作者：
Han, Melinda Y.;Brant, Juliana C.;Kim, Philip
我们报告了对不同宽度和长度的光刻制造的石墨烯纳米带（GNR）的电子传输研究。在电荷中性点处，形成与长度无关的传输间隙，其大小与 GNR 宽度成反比。在这个间隙中，电子被局域化，并且电荷传输表现出较高温度下的热激活行为和较低温度下的可变范围跳跃之间的转变。通过改变几何电容，我们发现充电效应构成了活化能的很大一部分。
We report an electron transport study of lithographically fabricated graphene nanoribbons (GNRs) of various widths and lengths. At the charge neutrality point, a length-independent transport gap forms whose size is inversely proportional to the GNR width. In this gap, electrons are localized, and charge transport exhibits a transition between thermally activated behavior at higher temperatures and variable range hopping at lower temperatures. By varying the geometric capacitance, we find that charging effects constitute a significant portion of the activation energy.