Breakdown of the Law of Reflection at a Disordered Graphene Edge

E. Walter, T. O. Rosdahl, A. R. Akhmerov, F. Hassler

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
29 Downloads (Pure)


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.

Original languageEnglish
Article number136803
Number of pages5
JournalPhysical Review Letters
Issue number13
Publication statusPublished - 25 Sep 2018


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