SPINTHERM

This project will investigate the magneto-thermoelectric properties of magnetic and non-magnetic topological materials (such as topological insulators and Weyl semimetals) and the reciprocal interaction between thermoelectricity and spin physics. The search for new, efficient, and integrable thermoelectric (TE) compounds is an active area of research, driven by the advantages of converting heat waste into energy, powering autonomous devices or cooling electronic chips. While the most common and efficient TE materials currently in use are non magnetic topological materials (TM) like Bi2Se3 and Bi2Te3, we plan to build on recent discoveries which showed enhanced Nersnt et Seebeck effects in magnetic TM, with a large contribution induced by spin-related processes. We will particularly consider ferromagnetic compounds able to evidence large anomalous Nersnt or Seebeck effects. To do so, our consortium will gather experts from complementary fields: (i) state-of-the-art material growth by molecular beam epitaxy and chemical vapor transport giving access to a large panel of TM (such as magnetic TM, Bi1-xCrxTe3, Cr-doped WTe2, MnSb2Te4…); (ii) thermoelectric and thermal measurements and studies; (iii) magneto-transport and spin physics; (iv) first-principles calculations of topological and transport properties. By comparing the measured thermoelectric et thermal properties with theoretical simulations, we plan to understand how the interaction between magnetism and topology influences the spin-induced Seebeck and Nernst effects. By this combined experimental and theoretical approach, we aim to gain a deeper understanding of the spin-related mechanisms, in order to identify and synthesize new materials with enhanced magneto-thermoelectric properties.