Phase space for the breakdown of the quantum Hall effect in epitaxial graphene.

  title={Phase space for the breakdown of the quantum Hall effect in epitaxial graphene.},
  author={Jack A. Alexander-Webber and A. M. R. Baker and T. J. B. M. Janssen and Alexander Tzalenchuk and Samuel Lara-Avila and Sergey E. Kubatkin and R. Yakimova and B. A. Piot and Duncan K. Maude and Robin J Nicholas},
  journal={Physical Review Letters},
We report the phase space defined by the quantum Hall effect breakdown in polymer gated epitaxial graphene on SiC (SiC/G) as a function of temperature, current, carrier density, and magnetic fields up to 30 T. At 2 K, breakdown currents (I-c) almost 2 orders of magnitude greater than in GaAs devices are observed. The phase boundary of the dissipationless state (rho(xx) = 0) shows a [1 - (T/T-c)(2)] dependence and persists up to T-c > 45 K at 29 T. With magnetic field Ic was found to increase… Expand

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