Asymmetric magneto-transport in a Dirac semimetal heterostructure

A three-dimensional (3D) Dirac semimetal is known as a 3D analog of graphene; its Fermi-arc-like surface states are attractive for spintronic applications and can potentially modulate graphene via interface engineering. Here, we report the asymmetric magnetotransport in graphene/Cd₃As₂ heterostructure devices. The electron transfer occurring at the graphene/Cd₃As₂ interface results in a strong n-type doping of graphene. The interfacial coupling between graphene and Cd₃As₂ also enables us to selectively pin the chemical potential of graphene. The asymmetrical magnetotransport near the zero Landau level in graphene suggests that the interfacial coupling between Cd₃As₂ and graphene can be modulated by the magnetic field.