Quantum Interference in Graphene Nanoconstrictions
Quantum Interference in Graphene Nanoconstrictions
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DOI：
10.1021/acs.nanolett.6b01104
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发表时间：
2016-07-01
期刊：
影响因子：
10.8
通讯作者：
Mol, Jan A.
中科院分区：
文献类型：
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作者：
Gehring, Pascal;Sadeghi, Hatef;Mol, Jan A.
我们报道了利用反馈控制电燃烧制备的化学气相沉积石墨烯纳米收缩的电导中的量子干涉效应。观察到的多模法布里-珀罗涉可以归因于在通道内的潜在阶跃处的反射。观察到了具有Fano线形的尖锐的反共振特征。理论模拟表明，这些Fano共振是由于压缩内部的局域态，这些局域态耦合到非局域态，从而也产生了法布里-珀罗涉图案。这项研究为石墨烯纳米收缩中两种基本形式的量子干涉之间的相互作用提供了新的见解。
We report quantum interference effects in the electrical conductance of chemical vapor deposited graphene nanoconstrictions fabricated using feedback controlled electroburning. The observed multimode Fabry-Perot interferences can be attributed to reflections at potential steps inside the channel. Sharp antiresonance features with a Fano line shape are observed. Theoretical modeling reveals that these Fano resonances are due to localized states inside the constriction, which couple to the delocalized states that also give rise to the Fabry-Perot interference patterns. This study provides new insight into the interplay between two fundamental forms of quantum interference in graphene nanoconstrictions.