Quantum dot behavior in graphene nanoconstrictions.
Quantum dot behavior in graphene nanoconstrictions.
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DOI：
10.1021/nl803291b
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发表时间：
2008-11
期刊：
影响因子：
10.8
通讯作者：
Kathryn L Todd;H. Chou;S. Amasha;D. Goldhaber-Gordon
中科院分区：
文献类型：
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作者：
Kathryn L Todd;H. Chou;S. Amasha;D. Goldhaber-Gordon
石墨烯纳米带显示不完全理解的传输间隙。我们通过几种长度的纳米粒子装置测量传输。在长（>/=250 nm）纳米带中，我们观察到通过串联的多个量子点的传输，而较短（</=60 nm）的收缩显示单量子点和双量子点的行为特征。新的测量表明，点的大小可能与收缩宽度的比例。我们提出了一个模型，其中运输发生通过量子点的核背景无序势的存在下的限制间隙。
Graphene nanoribbons display an imperfectly understood transport gap. We measure transport through nanoribbon devices of several lengths. In long (>/=250 nm) nanoribbons we observe transport through multiple quantum dots in series, while shorter (</=60 nm) constrictions display behavior characteristic of single and double quantum dots. New measurements indicate that dot size may scale with constriction width. We propose a model where transport occurs through quantum dots that are nucleated by background disorder potential in the presence of a confinement gap.