Probing Electron Spin Resonance in Monolayer Graphene

The precise value of the g factor in graphene is of fundamental interest for all spin-related properties and their application. We investigate monolayer graphene on a Si/SiO2 substrate by resistively detected electron spin resonance. Surprisingly, the magnetic moment and corresponding g factor of 1.952 +/- 0.002 is insensitive to charge carrier type, concentration, and mobility.