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Laser energy tuning of carrier effective mass and thermopower in epitaxial oxide thin films
Journal article   Peer reviewed

Laser energy tuning of carrier effective mass and thermopower in epitaxial oxide thin films

A. I. Abutaha, S. R. Sarath Kumar and H. N. Alshareef
Applied physics letters, Vol.100(16), pp.162106-162106-4
16/04/2012
DOI: https://doi.org/10.1063/1.4704183

Abstract

Physical Sciences Physics Physics, Applied Science & Technology
The 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 film deposited using the highest laser fluence of 7 J cm-2 pulse-1.

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