Topological Nernst Effect in ternary kagome compound ScMn₆Sn₆

Electromagnetic phenomenon topological Hall effect (THE) and its thermoelectric equivalent, topological Nernst effect (TNE), are known to be the two signature properties of a skyrmion lattice (SkL) phase. Recent reports on YMn₆Sn₆ show that THE can also be observed in spiral magnets with no static spin chirality, which arises the necessity of looking for TNE in similar materials. With the aim of investigating the origin of these hallmark properties (THE and TNE) of SkL in other spiral magnets we perform the electrical and thermal transport study on ScMn₆Sn₆. Our results show that along with the THE, ScMn₆Sn₆ gives rise to the topological Nernst effect as well. So far only three other materials have been reported to exhibit TNE, which puts ScMn₆Sn₆ in a small group of materials hosting multiple topological effects. The similarity between the critical fields and the critical temperatures of THE and TNE suggest that both these phenomena have the same origin. In this talk we will discuss our attempt to understand the origin of these effects.