MIT News  March 17, 2023 van der Waals (vdW) heterostructures formed by 2D magnets and semiconductors have provided a fertile ground for fundamental science and spintronics. Through first-principles calculations researchers at MIT have found a proximity exchange splitting of 14 meV (equivalent to an effective Zeeman field of 120 T) in the vdW magnet-semiconductor heterostructure MoS 2/CrBr 3, leading to a 2D spin-polarized half-metal with carrier densities ranging up to 1013 cm−2. They explored the effect of large exchange coupling on the electronic band structure when the magnetic layer hosts chiral spin textures such as skyrmions. A flat Chern band […]