Anisotropy transport in monolayer black phosphorus under period magnetic modulation

We theoretically investigate the transport through a planar magnetic and electric barrier on the surface of monolayer black phosphorus (BP). In monolayer BP superlattice system, there are two different kinds of mechanics that block the transmission: One comes from the shift of gap in the energy spectrum induced by the magnetic field, the other comes from the enhanced superlattice minigap effect by the resonant coupling. There is strong anisotropic conductances along different directions, which caused by unique band structure. We find that the conductance ratio can be equal to 1 or -1, which can be controlled by tuning the incident energy, the magnetic field and the number of parallel magnetic modulation. This behavior offers us an efficient way to control the anisotropy transport and pave a way to construct monolayer black phosphorus-based electronic devices.