- Vielteilchenphysik der kondensierten Materie
- Stark korrelierte Fermionen
- Neue Quantenzustände der Materie: topologische Supraleitung, Quanten-Spin-Hall-Effekt
Quantum-Spin-Hall (QSH) materials are two-dimensional representatives of the family of topological insulators. They promise revolutionary device applications ("spintronics") based on dissipationless propagations of spin currents at their edges (see Fig. above).
The search for topological superconolactors (TSC) has recently become a key issue in conolensed matter physics, because of their possible relevance to provide a platform for Majorana bound states, non-Abelianstatistics and quantum computing.
When one wants to reslve the competing phases (such as the anti-ferromagnetic (AF) and superconducting (SC) phases in e.g. the High-Temperature Superconductors) one has to bridge in a controlled manner on enormous difference in energy scales: