Exploring the mysteries of topology in quantum materials by spin-resolved spectroscopies

Abstract

Materials with unique quantum characteristics–quantum materials—have become of great importance for information technology. Among others, their unique transport phenomena are in many cases closely connected to details of the electronic structure. Exploring the electronic states and the interplay of the interactions in this material class down to the electron spin is, therefore, mandatory to understand and further design their physical behavior. We discuss several quantum materials studied by an advanced photoelectron spectroscopy approach—spin-resolved momentum microscopy with tunable synchrotron radiation—and illustrate the role of a progressive symmetry reduction leading to particular features of their electronic structures observed in the experiment.