Magnetoresistance measurements of Graphene at the Charge Neutrality Point

Details Magnetoresistance measurements of Graphene at the Charge Neutrality Point Magnetoresistance measurements of Graphene at the Charge Neutrality Point

2012-01-21

arxiv.org/abs/1201.4434v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We report on transport measurements of the insulating state that forms at the charge neutrality point of graphene in a magnetic field. Using both conventional two-terminal measurements, sensitive to bulk and edge conductance, and Corbino measurements, sensitive only to the bulk conductance, we observed a vanishing conductance with increasing magnetic fields. By examining the resistance changes of this insulating state with varying perpendicular and in-plane fields, we probe the spin-active components of the excitations in total fields of up to 45 Tesla. Our results indicate that \nu=0 quantum Hall state in single layer graphene is not spin polarized.

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