Electronic structure of epitaxial bilayer FeSb/SrTiO₃(001)

Two-dimensional (2D) magnets exhibit unique physical properties for potential applications in spintronics. To date, most 2D ferromagnets are obtained by mechanical exfoliation of bulk materials with van der Waals interlayer interactions, and the synthesis of single or few-layer 2D ferromagnets with strong interlayer coupling remains experimentally challenging. In this talk, we will report the epitaxial growth of 2D non-van der Waals ferromagnetic bilayer FeSb on SrTiO₃(001) substrates stabilized by strong coupling to the substrate, which exhibits in-plane magnetic anisotropy and a Curie temperature above 300 K. We will also discuss the electronic structure of the FeSb films based on angle-resolved photoemission spectroscopy measurements, complemented by in situ low-temperature scanning tunneling microscopy/spectroscopy and density-functional theory calculations.