Breakdown of the Law of Reflection at a Disordered Graphene Edge

Journal article (2018)

Authors

E. Walter Ludwig Maximilians University, JARA-FIT Institute for Quantum Information
T.O. Rosdahl QN/Akhmerov Group - AS , Kavli institute of nanoscience Delft, QRD/Wimmer Group - QuTech Advanced Research Centre
A.R. Akhmerov QN/Akhmerov Group - AS , Kavli institute of nanoscience Delft
F Hassler Rheinisch-Westfälische Technische Hochschule
Research Group
QN/Akhmerov Group (AS) (TU Delft)
Copyright: © 2018 E. Walter, T.O. Rosdahl, A.R. Akhmerov, F Hassler
DOI
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https://doi.org/10.1103/PhysRevLett.121.136803
More Info
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Published Date

25-09-2018

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Akhmerov Group

Abstract

The law of reflection states that smooth surfaces reflect waves specularly, thereby acting as a mirror. This law is insensitive to disorder as long as its length scale is smaller than the wavelength. Monolayer graphene exhibits a linear dispersion at low energies and consequently a diverging Fermi wavelength. We present proof that for a disordered graphene boundary, resonant scattering off disordered edge modes results in diffusive electron reflection even when the electron wavelength is much longer than the disorder correlation length. Using numerical quantum transport simulations, we demonstrate that this phenomenon can be observed as a nonlocal conductance dip in a magnetic focusing experiment.