FIB structures of quantum materials: an outlook

Recent evolutions in the field of Focused Ion Beams are enabling unprecedented control over the shape and functionality of chemically complex materials. Unlike mature systems, such as Si which can be readily processed by lithographic means, novel materials often occur in the form of small, inhomogeneous particles which call for maskless fabrication methods. Furthermore, current trends in magnetic, topological and correlated quantum materials evolve around 3D metallic and semi-metallic compounds in which physical properties cannot be defined by electrostatic gates like silicon. Instead, their electronic functionality follows their 3D shape – calling for non-planar structuring methods. These challenges are well met by 3D FIB fabrication. I will review ongoing challenges in the field of microstructured quantum matter and paint an outlook of physics, material science and FIB developments on its path into the future.