Giant Magnetoresistance in Ultrasmall Graphene Based Devices
Giant Magnetoresistance in Ultrasmall Graphene Based Devices
By computing spin-polarized electronic transport across a finite zigzag graphene ribbon bridging two metallic graphene electrodes, we demonstrate, as a proof of principle, that devices featuring 100% magnetoresistance can be built entirely out of carbon. In the ground state a short zigzag ribbon is an antiferromagnetic insulator which, when connecting …