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Article Dans Une Revue Physical Review Letters Année : 2016

Puddle-Induced Resistance Oscillations in the Breakdown of the Graphene Quantum Hall Effect

W. Desrat
Benoit Jouault

Résumé

We report on the stability of the quantum Hall plateau in wide Hall bars made from a chemically gated graphene film grown on SiC. The ν=2 quantized plateau appears from fields B≃5  T and persists up to B≃80  T. At high current density, in the breakdown regime, the longitudinal resistance oscillates with a 1/B periodicity and an anomalous phase, which we relate to the presence of additional electron reservoirs. The high field experimental data suggest that these reservoirs induce a continuous increase of the carrier density up to the highest available magnetic field, thus enlarging the quantum plateaus. These in-plane inhomogeneities, in the form of high carrier density graphene pockets, modulate the quantum Hall effect breakdown and decrease the breakdown current.
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Dates et versions

hal-01939530 , version 1 (04-06-2019)

Identifiants

Citer

M. Yang, O. Couturaud, W. Desrat, C. Consejo, D. Kazazis, et al.. Puddle-Induced Resistance Oscillations in the Breakdown of the Graphene Quantum Hall Effect. Physical Review Letters, 2016, 117 (23), pp.237702. ⟨10.1103/PhysRevLett.117.237702⟩. ⟨hal-01939530⟩
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