Half Metallic Bilayer Graphene

Abstract

Charge neutral bilayer graphene has a gapped ground state as transport experiments demonstrate. One of the plausible such ground states is layered antiferromagnetic spin density wave (LAF) state, where the spins in top and bottom layers have same magnitude with opposite directions. We propose that lightly charged bilayer graphene in an electric field perpendicular to the graphene plane may be a half metal as a consequence of the inversion and particle-hole symmetry broken in the LAF state. We show this explicitly by using a mean field theory on a 2-layer Hubbard model for the bilayer graphene.

4+ pages, 4 figures

References in corpus (22)

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• Possible Broken Inversion and Time-Reversal Symmetry State of Electrons in Bilayer Graphene

Cited by in corpus (13)

• Electronic properties of graphene-based bilayer systems
• Instabilities on graphene's honeycomb lattice with electron-phonon interactions
• Doping a correlated band insulator: A new route to half metallic behaviour
• Gate Tunable Magnetism and Giant Magnetoresistance in ABC-stacked Few-Layer Graphene
• Field-effect-driven half-metallic multilayer graphene
• Correlation driven metallic and half-metallic phases in a band insulator
• Gate-induced half-metals in Bernal stacked graphene multilayer
• Electrically controllable magnetic order in the bilayer Hubbard model on honeycomb lattice --- a determinant quantum Monte Carlo study
• Spin-density wave state in simple hexagonal graphite
• Local field correction effects on quasi-particle inelastic scattering rate in a coupled-quantum-layers system at finite temperature
• Spontaneous charge-ordered state in Bernal-stacked bilayer graphene
• Anomalous Bloch oscillation and electrical switching of edge magnetization in bilayer graphene nanoribbon
• Ordered states of undoped AB bilayer graphene: bias induced cascade of transitions