Theoretical investigation on the ferromagnetic two-dimensional scandium monochloride sheet that has a high Curie temperature

Abstract A two-dimensional scandium monochloride sheet was investigated by using density functional theory. The cleavage energy from the bulk material is slightly lower than that of graphene. The sheet has a ferromagnetic ground state with a Curie temperature of 100 K. Moreover, the sheet becomes a half-metal under hole doping. The Curie temperature increases to 250 K with the doping amount of 0.4 per primitive cell. The two-dimensional scandium monochloride sheet should be a good candidate for two-dimensional spintronics.