|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications IX
||Thermomagnetic Properties of Single-crystal 2H-NbSe2 and Bi2Te3
||Md Sabbir Akhanda, S. Emad Rezaei, Md Golam Rosul, Keivan Esfarjani, Sergiy Krylyuk, Albert Davydov, Mona Zebarjadi
|On-Site Speaker (Planned)
||Md Sabbir Akhanda
Magneto-thermoelectric properties of topological materials recently have caught much attention for their potential in the heat-to-electricity energy conversion process. In this work, the Nernst coefficient, magneto-Seebeck, and magnetoresistance of two topological single-crystal materials: 2H-NbSe2 and Bi2Te3, were investigated over a wide temperature range. Seebeck coefficient, electrical conductivity, and thermal conductivity measurements are also presented to provide insight into the transport properties. Nernst coefficient measurements have been compared with the Moreau’s relation to validating the overall trend. Theoretical predictions based on first-principles calculations were included to substantiate the experiments. In the case of Bi2Te3, we observe that the Nernst coefficient and the magneto-Seebeck both increase as the temperature decreases which can be attributed to the increase of the carrier mobility. Despite the fact that NbSe2 is a Weyl semimetal with bipolar conduction, we observe a very small Nernst coefficient at room temperature that further decreases as the temperature decreases.