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- W2314930621 abstract "A novel superlattice structure based on epitaxial nanoscale layers of NbOx and Nb-doped SrTiO3 is fabricated using a layer-by-layer approach on lattice matched LAO substrates. The absolute Seebeck coefficient and electrical conductivity of the [(NbOx)a/(Nb-doped SrTiO3)b]20 superlattices (SLs) were found to increase with decreasing layer thickness ratio (a/b ratio), reaching, at high temperatures, a power factor that is comparable to epitaxial Nb-doped SrTiO3 (STNO) films (∼0.7 W m–1 K–1). High temperature studies reveal that the SLs behave as n-type semiconductors and undergo an irreversible change at a varying crossover temperature that depends on the a/b ratio. By use of high resolution X-ray photoelectron spectroscopy and X-ray diffraction, the irreversible changes are identified to be due to a phase transformation from cubic NbO to orthorhombic Nb2O5, which limits the highest temperature of stable operation of the superlattice to 950 K." @default.
- W2314930621 created "2016-06-24" @default.
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- W2314930621 date "2014-04-09" @default.
- W2314930621 modified "2023-10-10" @default.
- W2314930621 title "Thermoelectric Properties of Strontium Titanate Superlattices Incorporating Niobium Oxide Nanolayers" @default.
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- W2314930621 doi "https://doi.org/10.1021/cm500646f" @default.
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