Field induced quantum-Hall ferromagnetism in suspended bilayer graphene

Abstract

We have measured the magneto-resistance of freely suspended high-mobility bilayer graphene. For magnetic fields $B>1$ T we observe the opening of a field induced gap at the charge neutrality point characterized by a diverging resistance. For higher fields the eight-fold degenerated lowest Landau level lifts completely. Both the sequence of this symmetry breaking and the strong transition of the gap-size point to a ferromagnetic nature of the insulating phase developing at the charge neutrality point.

7 pages, 5 figures

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• Broken-symmetry $\nu =0$ quantum Hall states in bilayer graphene: Landau level mixing and dynamical screening
• Spin Symmetry of the Bilayer Graphene Groundstate
• Magneto-optical and optical probes of gapped ground states of bilayer graphene
• Distinct Competing Ordered ν=2 States in Bilayer Graphene
• Quantum Hall transport as a probe of capacitance profile at graphene edges
• Energy gaps and layer polarization of integer and fractional quantum Hall states in bilayer graphene
• Fine structure of the lowest Landau level in suspended trilayer graphene
• Transport Measurement of Landau level Gaps in Bilayer Graphene
• Gap generation in ABC-stacked multilayer graphene: screening vs band flattening
• Theory of inter-Landau level magnetoexcitons in bilayer graphene
• Energetics of complex phase diagram in a tunable bilayer graphene probed by quantum capacitance
• Electromagnetic absorption and Kerr effect in quantum Hall ferromagnetic states of bilayer graphene
• Particle-hole symmetry and bifurcating ground state manifold in the quantum Hall ferromagnetic states of multilayer graphene
• Spin-Polarized-Current State of Electrons in Bilayer Graphene
• Electron-electron interactions in non-equilibrium bilayer graphene
• Broken symmetry states in bilayer graphene in electric and in-plane magnetic fields
• Current orderings of interacting electrons in bilayer graphene
• Competing topological phases in few-layer graphene
• Phase boundary of spin-polarized-current state of electrons in bilayer graphene