1 research outputs found
Asymmetric Modulation on Exchange Field in a Graphene/BiFeO<sub>3</sub> Heterostructure by External Magnetic Field
Graphene, having all atoms on its
surface, is favorable to extend
the functions by introducing the spin–orbit coupling and magnetism
through proximity effect. Here, we report the tunable interfacial
exchange field produced by proximity coupling in graphene/BiFeO<sub>3</sub> heterostructures. The exchange field has a notable dependence
with external magnetic field, and it is much larger under negative
magnetic field than that under positive magnetic field. For negative
external magnetic field, interfacial exchange coupling gives rise
to evident spin splitting for <i>N</i> ≠0 Landau
levels and a quantum Hall metal state for <i>N</i> = 0 Landau
level. Our findings suggest graphene/BiFeO<sub>3</sub> heterostructures
are promising for spintronics