Strong anisotropy in nearly ideal tetrahedral superconducting FeS single crystals
Strong anisotropy in nearly ideal tetrahedral superconducting FeS single crystals
Mackinawite, the tetragonal form of FeS, is the newest iron-based superconductor that generates excitement in the field, as it represents a direction away from the purely arsenide- and selenide-based systems. Other sulfides have been shown recently to have superconducting properties, including BaFe${}_{2}$S${}_{3}$ under high pressures and H${}_{2}$S under extreme pressures, …