Large magnetic anisotropy and enhanced Curie temperature in two-dimensional MnTe coupled with β-phase group-VA semiconductor monolayers.

Promoting the Curie temperature ( ) and tunning the magnetocrystalline anisotropy energy (MAE) have been key issues with two-dimensional (2D) ferromagnetic (FM) materials. Here, the structural and magnetic properties of MnTe/X (X = As, Sb and Bi) heterostructures are investigated through first-principles calculations. We reveal that monolayer MnTe weakly interacts with monolayer As or Sb through van der Waals (vdW) forces, but has strong covalent bonds with monolayer Bi, indicated by Bi-Te bond formation.

Can Vacuum Deposition Apply to Bismuth-Doped γ-CsPbI Perovskite? Revealing the Role of Bi in the Formation of Black Phase.

The B-site doped CsPbI has been demonstrated to be very promising for photovoltaics owing to its low black phase transition temperature. Though B-site doped black-CsPbI perovskites have been successfully achieved by solution-processing, it is unclear whether these systems are available by other methods such as vacuum deposition. In this work, heterovalent doped CsPbBiI is targeted.