Topological materials attract a huge attention, recently. Their properties are invariant under topological transformations and indicate the existence of Majorana, Weyl and Dirac fermions. We will use external pressure as a clean tool to tune the band structure of topological materials, such as the Weyl semimetals. Quantum oscillation measurements under pressure allow us to probe the pressure-evolution of the band structure. Furthermore, Hall-effect and electrical resistivity data give us information on the charge carriers and their mobility. For this project, we are looking for a PhD student with strong experimental skills, who is interested in experiments under multi-extreme conditions.