Gyrotropic Zener tunneling and nonlinear IV curves in the zero-energy Landau level of graphene in a strong magnetic field

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Details

Original languageEnglish
Article number594
Pages (from-to)1-10
JournalSCIENTIFIC REPORTS
Volume8
Issue number1
StatePublished - 1 Dec 2018
MoE publication typeA1 Journal article-refereed

Researchers

Research units

  • Hebrew University of Jerusalem

Abstract

We have investigated tunneling current through a suspended graphene Corbino disk in high magnetic fields at the Dirac point, i.e. at filling factor ν = 0. At the onset of the dielectric breakdown the current through the disk grows exponentially before ohmic behaviour, but in a manner distinct from thermal activation. We find that Zener tunneling between Landau sublevels dominates, facilitated by tilting of the source-drain bias potential. According to our analytic modelling, the Zener tunneling is strongly affected by the gyrotropic force (Lorentz force) due to the high magnetic field.

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