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Large Seebeck coefficients and thermoelectric power factor of La-doped SrTiO3 thin films
Published Web Location
http://link.aip.org/link/APPLAB/v97/i4/p042106/s1Abstract
Seebeck coefficients and conductivity of La-doped SrTiO3 thin films grown by molecular beam epitaxy were measured as a function of carrier concentration. At low carrier concentrations, thin films show very high Seebeck coefficients (up to 980 μV K−1). The maximum thermoelectric power factor was 39 μWcm−1 K−2 at a carrier concentration of 7×1020 cm−3. La-delta-doped superlattices were also characterized and exhibited Seebeck coefficients of ∼ 500 μV K−1. The results are discussed in the context of reports of enhanced Seebeck coefficients in delta-doped SrTiO3 superlattices.
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