2D FeO: A New Member in 2D Metal Oxide Family

Here, we report a comprehensive theoretical investigation of ultrathin FeO films as well as a principally novel two-dimensional (2D) FeO monolayer with an uncommon orthorhombic lattice structure. It was shown that 2D FeO is a semiconductor with a robust antiferromagnetic spin ordering. The interface energy of 2D FeO/graphene planar heterostructures was derived analytically, and the optimal shape of the 2D FeO spot in graphene was predicted. Close correspondence between simulated data and reference experiment supports the proposed model.