Laser energy tuning of carrier effective mass and thermopower in epitaxial oxide thin films
KAUST DepartmentMaterials Science and Engineering Program
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AbstractThe effect of the laser fluence on high temperature thermoelectric properties of the La doped SrTiO3 (SLTO) thin films epitaxially grown on LaAlO3 〈100〉 substrates by pulsed laser deposition is clarified. It is shown that oxygen vacancies that influence the effective mass of carriers in SLTO films can be tuned by varying the laser energy. The highest power factor of 0.433 W K−1 m−1 has been achieved at 636 K for a filmdeposited using the highest laser fluence of 7 J cm−2 pulse−1.
CitationLaser energy tuning of carrier effective mass and thermopower in epitaxial oxide thin films 2012, 100 (16):162106 Applied Physics Letters
JournalApplied Physics Letters