Quantum Interference in Graphene Nanoconstrictions

被引：75

作者：

Gehring, Pascal ^{[1
]}

Sadeghi, Hatef ^{[2
]}

Sangtarash, Sara ^{[2
]}

Lau, Chit Siong ^{[1
]}

Liu, Junjie ^{[1
]}

Ardavan, Arzhang ^{[3
]}

Warner, Jamie H. ^{[1
]}

Lambert, Colin J. ^{[2
]}

Briggs, G. Andrew. D. ^{[1
]}

Mol, Jan A. ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, 16 Parks Rd, Oxford OX1 3PH, England

[2] Univ Lancaster, Dept Phys, Quantum Technol Ctr, Lancaster LA1 4YB, England

[3] Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England

来源：

NANO LETTERS | 2016年 / 16卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

Graphene; quantum interference; Fano resonance; break junction; Fabry-Perot; FANO RESONANCES; ELECTRONIC TRANSPORT; CONFINEMENT; TRANSISTORS; COHERENCE;

D O I：

10.1021/acs.nanolett.6b01104

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

收藏

页码：4210 / 4216

页数：7

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