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/content/aip/journal/aplmater/1/2/10.1063/1.4818356
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17.See supplementary material at http://dx.doi.org/10.1063/1.4818356 for details of the fabrication, resistivity as well as the resistivity and thermoelectric power of La1/2Ca1/2MnO3 thin films. [Supplementary Material]
http://aip.metastore.ingenta.com/content/aip/journal/aplmater/1/2/10.1063/1.4818356
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/content/aip/journal/aplmater/1/2/10.1063/1.4818356
2013-08-12
2016-12-09

Abstract

We propose a novel route for optimizing the thermoelectric power of a polaronic conductor, independent of its electronic conductivity. This mechanism is exemplified here in thin-films of LaNiO. Tensile stress induced by epitaxial growth on SrTiO doubles the thermoelectric power of ≈15 nm thick films relative to ≈90 nm films, while the electronic conductivity remains practically unchanged. Epitaxial strain influences the statistical contribution to the high temperature thermopower, but introduces a smaller correction to the electronic conductivity. This mechanism provides a new way for optimizing the high temperature thermoelectric performance of polaronic conductors.

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