Unified modelling of the thermoelectric properties in SrTiO3

Thermoelectric materials are opening a promising pathway to address energy conversion issues governed by a competition between thermal and electronic transport. Improving the efficiency is a difficult task, a challenge that requires new strategies to unearth optimized compounds. We present a theory...

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Bibliographic Details
Published inarXiv.org
Main Authors Bouzerar, G, Thébaud, S, Adessi, Ch, Debord, R, Apreutesei, M, Bachelet, R, Pailhès, S
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 09.02.2017
Subjects
Carrier density
Electron transport
Energy conversion
Gadolinium
Physics - Materials Science
Qualitative analysis
Strontium titanates
Thermoelectric materials
Thin films
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Summary:Thermoelectric materials are opening a promising pathway to address energy conversion issues governed by a competition between thermal and electronic transport. Improving the efficiency is a difficult task, a challenge that requires new strategies to unearth optimized compounds. We present a theory of thermoelectric transport in electron doped SrTiO3, based on a realistic tight binding model that includes relevant scattering processes. We compare our calculations against a wide panel of experimental data, both bulk and thin films. We find a qualitative and quantitative agreement over both a wide range of temperatures and carrier concentrations, from light to heavily doped. Moreover, the results appear insensitive to the nature of the dopant La, B, Gd and Nb. Thus, the quantitative success found in the case of SrTiO3, reveals an efficient procedure to explore new routes to improve the thermoelectric properties in oxides.
ISSN:2331-8422
DOI:10.48550/arxiv.1702.02751