Quantum Hall activation gaps in bilayer graphene

Details Quantum Hall activation gaps in bilayer graphene Quantum Hall activation gaps in bilayer graphene

2010-09-28

arxiv.org/abs/1009.5485v2

Solid State Communications 150, 2209-2211 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, accepted version (just removed a few typos), will appear as Fast Track Communication in Solid State Commun

Scientific paper

10.1016/j.ssc.2010.09.042

We have measured the quantum Hall activation gaps in bilayer graphene at filling factors $\nu=\pm4$ and $\nu=\pm8$ in high magnetic fields up to 30 T. We find that energy levels can be described by a 4-band relativistic hyperbolic dispersion. The Landau level width is found to contain a field independent background due to an intrinsic level broadening and a component which increases linearly with magnetic field.

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