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

Mika Oksanen, Andreas Uppstu, Antti Laitinen, Daniel J. Cox, Monica F. Craciun, Saverio Russo, Ari Harju, and Pertti Hakonen
Phys. Rev. B 89, 121414(R) – Published 31 March 2014
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Abstract

We have achieved high-quality Fabry-Pérot 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-Pérot oscillations with universal conductance fluctuations.

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  • Received 15 August 2013

DOI:https://doi.org/10.1103/PhysRevB.89.121414

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Authors & Affiliations

Mika Oksanen1, Andreas Uppstu2, Antti Laitinen1, Daniel J. Cox1, Monica F. Craciun3, Saverio Russo3, Ari Harju2, and Pertti Hakonen1

  • 1Low Temperature Laboratory, Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland
  • 2COMP Centre of Excellence and Helsinki Institute of Physics, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland
  • 3Centre for Graphene Science, School of Physics, University of Exeter, EX4 4QL Exeter, United Kingdom

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Vol. 89, Iss. 12 — 15 March 2014

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