We study a graphene Hall probe located on top of a magnetic surface as adetector of skyrmions, using as working principle the anomalous Hall effectproduced by the exchange interaction of the graphene electrons with thenon-coplanar magnetization of the skyrmion. We study the magnitude of theeffect as a function of the exchange interaction, skyrmion size and devicedimensions. Our calculations for multiterminal graphene nanodevices, working inthe ballistic regime, indicate that for realistic exchange interactions asingle skyrmion would give Hall voltages well within reach of the experimentalstate of the art. The proposed device could act as an electrical transducerthat marks the presence of a single skyrmion in a nanoscale region, paving theway towards the integration of skyrmion-based spintronics and grapheneelectronics.
展开▼
