Oxygen vacancy induced strong anisotropy of the thermoelectric properties of strontium barium niobate
Source abstract
Abstract
Abstract Electronic structure and thermoelectric properties of strontium barium niobate were investigated by first principles calculations combined with the semi-classical Boltzmann theory. The band structure corresponding to lattice anisotropy shows higher band dispersion along c axis, but the conductive pathway is mainly along ab plane. As a result, the values of power factor are in the same order of magnitude along different directions. Thus, the lattice anisotropy alone cannot result in the strong anisotropic thermoelectric properties of strontium barium niobate. Oxygen vacancies not only act as charge carrier donors, but also enhance the band dispersion and change the magnetic quantum number of the electrons around the bottom of conduction band. Accordingly, the thermoelectric properties of strontium barium niobate show very strong anisotropy after oxygen reduction.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Magnetic and transport properties of perovskites and related materials · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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