Summary

Abstract

Investigations of the physical and chemical properties of transition-metal oxides have a long history in solid-state and surface physics owing to the wide range of technical applications of these compounds. They have been used in lasers and catalysis for decades; their use in various sensors — e.g. for gases, high pressures, and magnetic fields — followed more recently. Not least a copper oxide is responsible for the occurrence of high-temperature superconductivity in various perovskites. For understanding and optimizing these applications, a detailed knowledge of the electronic structure of the bulk and also the surface of the transition-metal oxides is indispensable.