Large Nernst power factor over a broad temperature range in polycrystalline Weyl semimetal NbP
Fu C, Guin SN, Watzman SJ, Li G, Liu E, Kumar N, Suess V, Schnelle W, Auffermann G, Shekhar C, Sun Y, Gooth J, Felser C (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 11
Pages Range: 2813-2820
Journal Issue: 10
DOI: 10.1039/c8ee02077a
Abstract
The discovery of topological materials has provided new opportunities to exploit advanced materials for heat-to-electricity energy conversion as they share many common characteristics with thermoelectric materials. In this work, we report the magneto-thermoelectric properties and Nernst effect of the topological Weyl semimetal NbP. We find that polycrystalline, bulk NbP shows a significantly larger Nernst thermopower than its conventional thermopower under magnetic field. As a result, a maximum Nernst power factor of ∼35 × 10-4 W m-1 K-2 is achieved at 9 T and 136 K, which is 4 times higher than its conventional power factor and is also comparable to that of state-of-the-art thermoelectrics. Moreover, the Nernst power factor maintains relatively large value over a broad temperature range. These results highlight that the enhancement of thermoelectric performance can be achieved in topological semimetals based on the Nernst effect and transverse transport.
Involved external institutions
Germany (DE)How to cite
APA:
Fu, C., Guin, S.N., Watzman, S.J., Li, G., Liu, E., Kumar, N.,... Felser, C. (2018). Large Nernst power factor over a broad temperature range in polycrystalline Weyl semimetal NbP. Energy and Environmental Science, 11(10), 2813-2820. https://doi.org/10.1039/c8ee02077a
MLA:
Fu, Chenguang, et al. "Large Nernst power factor over a broad temperature range in polycrystalline Weyl semimetal NbP." Energy and Environmental Science 11.10 (2018): 2813-2820.
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