Tuning Thermoelectric Properties in Magnetic Weyl Semimetal Co₃Sn₂S₂ with Uniaxial Strain

The Kagome compound Co₃Sn₂S₂ has attracted significant attention as a magnetic Weyl semimetal, offering the possibility of controlling topological states through magnetic order. Although long regarded as a ferromagnet with out-of-plane magnetization below T_c = 177 K, recent studies have revealed unexpected magnetic complexity, including antiferromagnetic interactions under tilted magnetic fields and in-plane ferromagnetic-like components emerging above 90 K. Meanwhile, theoretical calculations have suggested the possibility of strain-induced topological phase transitions through the modification of Weyl-node configurations in momentum space. These findings highlight the need for additional tuning knobs for magnetism; thus, a thorough investigation of magnetic properties such as the anomalous Hall or Nernst effect under mechanical tunings would be of great interest. To explore these possibilities and to address the unresolved magnetic structure, we investigate uniaxial strain-dependent anomalous Hall and anomalous Nernst effects in Co₃Sn₂S₂. In this presentation, we will discuss findings from this novel technique, which demonstrate the feasibility of combining mechanical tuning and thermoelectric transport to explore the interplay between lattice distortion, magnetic order, and Berry curvature topology in this prototypical Kagome semimetal.