Impact of isotropic strain on magnetic properties of monolayer SnS2 doped with nonmagnetic metal and nonmetal atoms

Abstract

It is essential to explore two-dimensional (2D) material with magnetic ordering in new generation spintronic devices, particularly, the seeking of 2D ferromagnetic materials is a hot topic of current research. Here, we study magnetism of the nonmagnetic metal (Ag, Al, Li, Mg, and Na) and nonmetal (C, B, F, N, and O) doped SnS2 monolayer using first principle calculations. Magnetism has been induced by Ag and N doping. Then, we further have considered the effect of strain on the magnetism in one-Ag and N doped SnS2 monolayer. We have applied an isotropic strain on the system. On the one hand, the magnetism disappears while the compressive strain was implemented. One the other hand, the magnetism kept stable under the tensile strain. Moreover, a tunable magnetic coupling was found in the two-Ag-doped SnS2 monolayer. As the tensile strain increased, the magnetic coupling between two Ag atoms switched from antiferromagnetic (AFM) to ferromagnetic (FM). Meanwhile, a stable FM coupling was observed in the two-N-doped SnS2 monolayer. These fascinating controllable magnetic properties are desired for spintronic applications.