Infrared spectroscopy of quantum materlials, under extreme conditions (high pressures, low temperatures).
The project is part of the newly established Collaborative Research Centre TRR360 Constrained Quantum Matter, which is linked to a Research Training Group for the networking of doctoral students.
Pressure-induced excitations in the out-of-plane optical response of the nodal-line semimetal ZrSiS
The anisotropic optical response of the layered, nodal-line semimetal ZrSiS was investigated for the first time by frequency-dependent reflectivity measurements for the polarization along and perpendicular to the layers. Under external pressure, two prominent excitations appear in the out-of-plane optical conductivity, which are discussed in the context of the recently proposed excitonic insulator phase in ZrSiS.