Single-mode and multimode Fabry-Perot interference in suspended graphene

被引：34
|
作者：
Oksanen, Mika [1 ]
Uppstu, Andreas [2 ,3 ]
Laitinen, Antti [1 ]
Cox, Daniel J. [1 ]
Craciun, Monica F. [4 ]
Russo, Saverio [4 ]
Harju, Ari [2 ,3 ]
Hakonen, Pertti [1 ]
机构：
[1] Aalto Univ, Low Temp Lab, POB 15100, FI-00076 Aalto, Finland
[2] Aalto Univ, COMP Ctr Excellence, FI-00076 Aalto, Finland
[3] Aalto Univ, Helsinki Inst Phys, Dept Appl Phys, FI-00076 Aalto, Finland
[4] Univ Exeter, Sch Phys, Ctr Graphene Sci, Exeter EX4 4QL, Devon, England
来源：
PHYSICAL REVIEW B | 2014年 / 89卷 / 12期
基金：
英国工程与自然科学研究理事会; 芬兰科学院; 欧盟第七框架计划;
关键词：
CONDUCTANCE FLUCTUATIONS; TRANSPORT; PHASE;
D O I：
10.1103/PhysRevB.89.121414
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have achieved high-quality Fabry-Perot interference in a suspended graphene device both in conductance and in shot noise. A Fourier analysis of these reveals two sets of overlapping, coexisting interference patterns, with the ratios of the resonance intervals being equal to the width to length ratio of the device. We show that these sets originate from the unique coexistence of longitudinal and transverse resonances, with the longitudinal resonances occurring due to bunching of modes with low transverse momentum. Finally, the high quality of our samples allows us to probe the interaction renormalization of the Fermi velocity as well as the coexistence of Fabry-Perot oscillations with universal conductance fluctuations.
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页数：5
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