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

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 $\nu$ = 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

7 pages, 4 figures

References in corpus (7)

• Observation of Apparently Zero-Conductance States in Corbino Samples
• Observation of Quantum Hall Valley Skyrmions
• A simple drain current model for Schottky-barrier carbon nanotube field effect transistors
• Electron-phonon coupling in suspended graphene: supercollisions by ripples
• Unconventional fractional quantum Hall states and Wigner crystallization in suspended Corbino graphene
• Contact doping, Klein tunneling, and asymmetry of shot noise in suspended graphene
• SU(4) Skyrmions in the $\nu =\pm 1$ Quantum Hall State of Graphene

Cited by in corpus (3)

• Unconventional fractional quantum Hall states and Wigner crystallization in suspended Corbino graphene
• Landau velocity for collective quantum Hall breakdown in bilayer graphene
• Strong magnetoresistance in a graphene Corbino disk at low magnetic fields