Jonathan Hänel

Jonathan is investigating thermoelectricity - the interdependence of an electric field and a temperature gradient in a solid - of strongly correlated electron systems. Thermoelectricity can be used for enviromental-friendly energy harvesting from (waste) heat and, from a fundamental point of view, to probe electron organization in solids, especially if the electrons are strongly correlated. The measurement of the Seebeck and Nernst effect is technically challenging and therefore one of the main tasks is to build a new measurement setup for a dilution refrigerator to be used at low temperatures down to 50 mK and in magnetic fields up to 16 T. With this setup newly grown single crystals of strongly correlated materials are to be measured. The results are expected to advance the understanding of interesting phenomena in these compounds, like Kondo insulation or quantum criticality.