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dc.contributor.authorSarath Kumar, S. R.
dc.contributor.authorAbutaha, Anas I.
dc.contributor.authorHedhili, Mohamed N.
dc.contributor.authorAlshareef, Husam N.
dc.date.accessioned2015-05-14T08:30:38Z
dc.date.available2015-05-14T08:30:38Z
dc.date.issued2012-12-04
dc.identifier.citationEffect of oxygen vacancy distribution on the thermoelectric properties of La-doped SrTiO3 epitaxial thin films 2012, 112 (11):114104 Journal of Applied Physics
dc.identifier.issn00218979
dc.identifier.doi10.1063/1.4767840
dc.identifier.urihttp://hdl.handle.net/10754/552819
dc.description.abstractA detailed study of the role of oxygen vacancies in determining the effective mass and high temperature (300–1000 K) thermoelectricproperties of La-doped epitaxial SrTiO3 thin films is presented. It is observed that at intermediate temperatures, a transition from degenerate to non-degenerate behavior is observed in the Seebeck coefficient, but not electrical conductivity, which is attributed to heterogeneous oxygen non-stoichiometry. Heikes formula is found to be invalid for the films with oxygen vacancies. By fitting the spectroscopic ellipsometry (SE) data, obtained in the range 300–2100 nm, using a Drude-Lorentz dispersion relation with two Lorentz oscillators, the electrical and optical properties of the films are extracted. Using the excellent agreement between the transport properties extracted from SE modeling and direct electrical measurements, we demonstrate that an increase in concentration of oxygen vacancies results in a simultaneous increase of both carrier concentration and electron effective mass, resulting in a higher power factor.
dc.publisherAIP Publishing
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/jap/112/11/10.1063/1.4767840
dc.rightsArchived with thanks to Journal of Applied Physics
dc.titleEffect of oxygen vacancy distribution on the thermoelectric properties of La-doped SrTiO3 epitaxial thin films
dc.typeArticle
dc.contributor.departmentFunctional Nanomaterials and Devices Research Group
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Applied Physics
dc.eprint.versionPublisher's Version/PDF
kaust.personSarath Kumar, S. R.
kaust.personAbutaha, Anas I.
kaust.personHedhili, Mohamed N.
kaust.personAlshareef, Husam N.
refterms.dateFOA2018-06-14T06:15:23Z
dc.date.published-online2012-12-04
dc.date.published-print2012-12


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