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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14292
Title: Rare earth doping and effective band-convergence in SnTe for improved thermoelectric performance
Authors: Acharya S.
Dey D.
Maitra, Tulika
Soni A.
Taraphder A.
Published in: Applied Physics Letters
Abstract: Thermoelectric performance of SnTe has been found to enhance with isovalent doping of alkaline and transition metal elements where most of these elements have a solubility of less than 13%. We propose a strategy of doping rare earth element Yb to enhance the thermoelectric performance of SnTe. With heavy atomic mass and strong spin-orbit coupling, even the mild doping of Yb (∼5%) is enough to create a degeneracy via band-convergence which enhances the density of states near the Fermi level and improves the overall performance. Our transport data and first-principles calculations corroborate that nearly 5% Yb is an efficient dopant to achieve thermoelectric response which is equivalent to 9% of Mn doping. The results are useful for understanding the environmentally friendly thermoelectric SnTe. © 2018 Author(s).
Citation: Applied Physics Letters (2018), 113(19): -
URI: https://doi.org/10.1063/1.5055250
http://repository.iitr.ac.in/handle/123456789/14292
Issue Date: 2018
Publisher: American Institute of Physics Inc.
ISSN: 36951
Author Scopus IDs: 57191415063
57189329600
7004183343
8140351300
6602698909
Author Affiliations: Acharya, S., School of Basic Sciences, Indian Institute of Technology, Mandi, HP, 175005, India
Dey, D., Department of Physics and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur WB, 721302, India
Maitra, T., Department of Physics, Indian Institute of Technology, Roorkee, UK, 247667, India
Soni, A., School of Basic Sciences, Indian Institute of Technology, Mandi, HP, 175005, India
Taraphder, A., School of Basic Sciences, Indian Institute of Technology, Mandi, HP, 175005, India, Department of Physics and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur WB, 721302, India
Funding Details: AS gratefully acknowledges the Board of Research in Nuclear Sciences, India, for young scientist research award [37(3)/14/02/2015/BRNS] and Indian Institute of Technology Mandi for research facilities. DD acknowledges the Department of Science and Technology (DST), India, for INSPIRE research fellowship.
Corresponding Author: Soni, A.; School of Basic Sciences, Indian Institute of TechnologyIndia; email: ajay@iitmandi.ac.in
Appears in Collections:Journal Publications [PH]

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