Ixtreme · Exotic quantum states by locally-broken inversion symmetry in extreme conditions.

Strong correlations between electrons in solids lead to a variety of exotic quantum states like Mott insulator, unconventional high-Tc or odd-parity superconductivity. The groundbreaking discoveries of these states have not only generated huge advances in our understanding of condensed matter but also uncover a great potential for applications such as room-temperature superconductivity or quantum computing.Symmetry is an important concept in classifying quantum states. So far, the majority of research has focused on global symmetry. I have recently discovered striking experimental evidence that local inversion symmetry breaking opens up a new route for the appearance of novel quantum states of matter. Namely, it can induce novel types of odd-parity superconductivity with possibly topological character, a much-needed state for topological quantum computing. However, the effect of local inversion symmetry breaking on quantum states still lacks our control and understanding. In the Ixtreme project, I propose to generalise and exploit this concept by investigating materials with locally broken inversion symmetry as a platform of exotic quantum states. By measuring electric and thermal transport as well as magnetic properties in extreme conditions of very low temperature, high magnetic field and high hydrostatic and uniaxial pressure, the Ixtreme team will study and control the delicate interplay of local inversion-symmetry breaking with correlated electrons, magnetic and orbital degrees of freedom, topology, and superconductivity. Thereby, this project will establish new understanding of the physical properties of this promising novel class of unconventional metals and lead to new design methodologies for emergent states such as odd-parity superconductivity in locally non-centrosymmetric correlated electron systems.