Volume 118, Number 6, June 2017
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||25 August 2017|
Unified modelling of the thermoelectric properties in SrTiO3
1 Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière - F-69622, Lyon, France
2 INL, Site Ecole Centrale de Lyon - 36, Avenue Guy de Collongue, F-69134 Ecully, France
Received: 9 May 2017
Accepted: 25 July 2017
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.
PACS: 72.20.Pa – Thermoelectric and thermomagnetic effects / 72.15.Jf – Thermoelectric and thermomagnetic effects
© EPLA, 2017
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