One edge magnetic configurations in graphene, stanene and phosphorene zigzag nanoribbons

Graphene is well known for its extraordinary electronic and mechanical properties. Moreover, it has been shown that graphene's magnetic properties are also interesting due to its long spin diffusion length and, theoretically expected and experimentally demonstrated, spontaneous spin-polarization of nanoribbon zigzag edges. However, it is also quite clear now that there exist many other quasi two-dimensional (2D) graphenelike systems which do deserve attention, too. So, here the attention is also directed to the edge magnetism problem in stanene (2D Sn) and phosphorene (2D P). It is shown that these materials can exhibit a (so far hardly explored) phase with one zigzag edge being magnetic and the other - paramagnetic. This new phase may prove to be attractive for spintronics.