The magnetic anisotropy and spin filtering effect in ferromagnetic phosphorene

A two dimensional (2D) semiconductor integrated onto a ferromagnetic substrate presents a promising design for the expansion of new spintronic devices. Recently discovered 2D magnets, such as CrGeTe3 and CrX3 (X = Br, Cl, I) have led to intense research on new physical appearances and many practical applications. Here, we build the van der Waals heterostructure by layering a black phosphorene on top of a single layer of CrI3 substrate. We systematically investigate the electronic behavior of heterostructure through the first principle calculation. In comparison with CrI3 and phosphorene, the bandgap of heterostructure is reduced and it is more magnetic. Afterward, Phosphorene has twisted at an angle of 3.22° and 3.83° on CrI3 substrate to create new stacking configurations of heterostructure. We observe the band gap changes with twist angle. Our proposed heterostructure has a ferromagnetic ground state with out-of-plane magnetic anisotropic nature with perfect spin filtering capability, which offers a novel route for future magneto-optic and spintronic engineering.