Quantum Hall activation gaps in bilayer graphene

E. V. Kurganova; A. J. M. Giesbers; R. V. Gorbachev; A. K. Geim; K. S. Novoselov; J. C. Maan; U. Zeitler

doi:10.1016/j.ssc.2010.09.042

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arXiv · 1009.5485

Quantum Hall activation gaps in bilayer graphene

E. V. Kurganova·A. J. M. Giesbers·R. V. Gorbachev·A. K. Geim·K. S. Novoselov·J. C. Maan·U. Zeitler

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Abstract

We have measured the quantum Hall activation gaps in bilayer graphene at filling factors $ν=\pm4$ and $ν=\pm8$ 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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E. V. Kurganova, A. J. M. Giesbers, R. V. Gorbachev, A. K. Geim, K. S. Novoselov, J. C. Maan, U. Zeitler. 2010-10-08. Quantum Hall activation gaps in bilayer graphene. https://doi.org/10.1016/j.ssc.2010.09.042

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