Coexistence of electron and hole transport in graphene
arXiv:1107.3929 · doi:10.1103/PhysRevB.84.115314
Abstract
When sweeping the carrier concentration in monolayer graphene through the charge neutrality point, the experimentally measured Hall resistivity shows a smooth zero crossing. Using a two- component model of coexisting electrons and holes around the charge neutrality point, we unambiguously show that both types of carriers are simultaneously present. For high magnetic fields up to 30 T the electron and hole concentrations at the charge neutrality point increase with the degeneracy of the zero-energy Landau level which implies a quantum Hall metal state at ν=0 made up by both electrons and holes.
5 pages, 6 figures
References in corpus (12)
- Electric Field Effect in Atomically Thin Carbon Films
- Chiral tunneling and the Klein paradox in graphene
- Making graphene visible
- Quantum interference and Klein tunneling in graphene heterojunctions
- Quantum Hall Ferromagnetism in Graphene
- Landau Level Splitting in Graphene in High Magnetic Fields
- Multicomponent fractional quantum Hall effect in graphene
- The zero-energy state in graphene in a high magnetic field
- Dissipative Quantum Hall Effect in Graphene near the Dirac Point
- Quantum-Hall activation gaps in graphene
- Divergent resistance at the Dirac point in graphene: Evidence for a transition in a high magnetic field
- The enigma of the nu=0 quantum Hall effect in graphene
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