Largely Suppressed Magneto-Thermal Conductivity and Enhanced Magneto-Thermoelectric Properties in PtSn4
Fu C, Guin SN, Scaffidi T, Sun Y, Saha R, Watzman SJ, Srivastava AK, Li G, Schnelle W, Parkin SSP, Felser C, Gooth J (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 2020
Article Number: 4643507
Abstract
Highly conductive topological semimetals with exotic electronic structures offer fertile ground for the investigation of the electrical and thermal transport behavior of quasiparticles. Here, we find that the layer-structured Dirac semimetal PtSn4 exhibits a largely suppressed thermal conductivity under a magnetic field. At low temperatures, a dramatic decrease in the thermal conductivity of PtSn4 by more than two orders of magnitude is obtained at 9 T. Moreover, PtSn4 shows both strong longitudinal and transverse thermoelectric responses under a magnetic field. Large power factor and Nernst power factor of approximately 80-100 μW·cm-1·K-2 are obtained around 15K in various magnetic fields. As a result, the thermoelectric figure of merit zT is strongly enhanced by more than 30 times, compared to that without a magnetic field. This work provides a paradigm for the decoupling of the electron and hole transport behavior of highly conductive topological semimetals and is helpful for developing topological semimetals for thermoelectric energy conversion.
Involved external institutions
Max-Planck-Institut für Mikrostrukturphysik (MSP) / Max Planck Institute for Microstructure Physics
Germany (DE)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
University of California, Berkeley
United States (USA) (US)
University of Cincinnati
United States (USA) (US)
Germany (DE)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
University of California, Berkeley
United States (USA) (US)
University of Cincinnati
United States (USA) (US)
How to cite
APA:
Fu, C., Guin, S.N., Scaffidi, T., Sun, Y., Saha, R., Watzman, S.J.,... Gooth, J. (2020). Largely Suppressed Magneto-Thermal Conductivity and Enhanced Magneto-Thermoelectric Properties in PtSn4. Research, 2020. https://doi.org/10.34133/2020/4643507
MLA:
Fu, Chenguang, et al. "Largely Suppressed Magneto-Thermal Conductivity and Enhanced Magneto-Thermoelectric Properties in PtSn4." Research 2020 (2020).
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