[16a-K309-1~5] 9.4 Thermoelectric conversion

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[16a-K309-2] Direct Measurement of Transverse Thermoelectric Effect in WSi₂ Single Crystal

〇Shoya Ohsumi¹, Hidetoshi Imai¹, Hikari Manako¹, Shogo Yoshida¹, Ryuji Okazaki¹, Yoshiki Sato² (1.Tokyo Univ. of Sci, 2.Saitama Univ.)

Keywords:

Transverse thermoelectric,Axis dependent conduction polarity,semimetal

Transverse thermoelectric (TTE) conversion, in which the thermoelectric force is induced perpendicular to the temperature gradient, has attracted attention as an effective and flexible energy conversion. Although many candidates for TTE material have previously been proposed, verification of the TTE conversion in them has not been performed. In this study, we directly measured the transverse thermopower in WSi₂ single crystal. This exhibits the axis-dependent conduction polarity in thermopower. We applied a temperature gradient between two different crystallographic axes and simultaneously measured the transverse and longitudinal temperature differences and voltage drops using four thermocouples. The voltage drop along the transverse direction exhibits a large value and the obtained transverse thermopower is comparable to that of the ferromagnetic topological Heusler based on the anomalous Nernst effect.