Novel electronic and planar magnetic properties of two-dimensional surface decorated antimonene

Abstract

The structural, magnetic and electronic properties of antimonenes decorated by hydrogen and halogen have been systematically investigated by density functional theory. The results indicate that semi-decorated antimonene (SX-Sb) (X = H, F, Cl, Br and I) exhibit quasi-planar magnetism, while fully-decorated antimonene (FX-Sb) is a planar Dirac material. Due to the existence of Dirac-cone-like feature, the electronic properties of FX-Sb monolayer can be effectively tuned by applying an external biaxial strain or an electric field and meanwhile maintain a high carrier mobility. In addition, the ferromagnetic state of SX-Sb monolayer is found to be energetically stable. SF-Sb and SCl-Sb nanosheets are predicted to be room-temperature ferromagnetic. The diverse electronic and magnetic properties of antimonene highlight the potential applications in electronics and spintronics.