Anomalously large measured thermoelectric power factor in Sr1−xLaxTiO3 thin films due to SrTiO3 substrate reduction

Matthew L. Scullin, Choongho Yu, Mark Huijben, Subroto Mukerjee, Jan Seidel, Qian Zhang, Joel Moore, Arun Majumdar, R. Ramesh

    Research output: Contribution to journalArticleAcademic

    43 Citations (Scopus)

    Abstract

    We report the observation that thermoelectric thin films of La-doped SrTiO3 grown on SrTiO3 substrates yield anomalously high values of thermopower to give extraordinary values of power factor at 300 K. Thin films of Sr0.98La0.02TiO3, grown via pulsed laser deposition at low temperature and low pressure (450 °C, 10−7 Torr), do not yield similarly high values when grown on other substrates. The thin-film growth induces oxygen reduction in the SrTiO3 crystals, doping the substrate n type. It is found that the backside resistance of the SrTiO3 substrates is as low ( ∼ 12Ω/◻) as it is on the film side after film growth
    Original languageEnglish
    Article number202113
    Number of pages3
    JournalApplied physics letters
    Volume92
    Issue number20
    DOIs
    Publication statusPublished - 2008

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    thin films
    pulsed laser deposition
    low pressure
    oxygen
    crystals

    Keywords

    • IR-75214

    Cite this

    Scullin, Matthew L. ; Yu, Choongho ; Huijben, Mark ; Mukerjee, Subroto ; Seidel, Jan ; Zhang, Qian ; Moore, Joel ; Majumdar, Arun ; Ramesh, R. / Anomalously large measured thermoelectric power factor in Sr1−xLaxTiO3 thin films due to SrTiO3 substrate reduction. In: Applied physics letters. 2008 ; Vol. 92, No. 20.
    @article{daf62ec547fb46a8a2c76b10abf13485,
    title = "Anomalously large measured thermoelectric power factor in Sr1−xLaxTiO3 thin films due to SrTiO3 substrate reduction",
    abstract = "We report the observation that thermoelectric thin films of La-doped SrTiO3 grown on SrTiO3 substrates yield anomalously high values of thermopower to give extraordinary values of power factor at 300 K. Thin films of Sr0.98La0.02TiO3, grown via pulsed laser deposition at low temperature and low pressure (450 °C, 10−7 Torr), do not yield similarly high values when grown on other substrates. The thin-film growth induces oxygen reduction in the SrTiO3 crystals, doping the substrate n type. It is found that the backside resistance of the SrTiO3 substrates is as low ( ∼ 12Ω/◻) as it is on the film side after film growth",
    keywords = "IR-75214",
    author = "Scullin, {Matthew L.} and Choongho Yu and Mark Huijben and Subroto Mukerjee and Jan Seidel and Qian Zhang and Joel Moore and Arun Majumdar and R. Ramesh",
    year = "2008",
    doi = "10.1063/1.2916690",
    language = "English",
    volume = "92",
    journal = "Applied physics letters",
    issn = "0003-6951",
    publisher = "American Institute of Physics",
    number = "20",

    }

    Scullin, ML, Yu, C, Huijben, M, Mukerjee, S, Seidel, J, Zhang, Q, Moore, J, Majumdar, A & Ramesh, R 2008, 'Anomalously large measured thermoelectric power factor in Sr1−xLaxTiO3 thin films due to SrTiO3 substrate reduction' Applied physics letters, vol. 92, no. 20, 202113. https://doi.org/10.1063/1.2916690

    Anomalously large measured thermoelectric power factor in Sr1−xLaxTiO3 thin films due to SrTiO3 substrate reduction. / Scullin, Matthew L.; Yu, Choongho; Huijben, Mark; Mukerjee, Subroto; Seidel, Jan; Zhang, Qian; Moore, Joel; Majumdar, Arun; Ramesh, R.

    In: Applied physics letters, Vol. 92, No. 20, 202113, 2008.

    Research output: Contribution to journalArticleAcademic

    TY - JOUR

    T1 - Anomalously large measured thermoelectric power factor in Sr1−xLaxTiO3 thin films due to SrTiO3 substrate reduction

    AU - Scullin, Matthew L.

    AU - Yu, Choongho

    AU - Huijben, Mark

    AU - Mukerjee, Subroto

    AU - Seidel, Jan

    AU - Zhang, Qian

    AU - Moore, Joel

    AU - Majumdar, Arun

    AU - Ramesh, R.

    PY - 2008

    Y1 - 2008

    N2 - We report the observation that thermoelectric thin films of La-doped SrTiO3 grown on SrTiO3 substrates yield anomalously high values of thermopower to give extraordinary values of power factor at 300 K. Thin films of Sr0.98La0.02TiO3, grown via pulsed laser deposition at low temperature and low pressure (450 °C, 10−7 Torr), do not yield similarly high values when grown on other substrates. The thin-film growth induces oxygen reduction in the SrTiO3 crystals, doping the substrate n type. It is found that the backside resistance of the SrTiO3 substrates is as low ( ∼ 12Ω/◻) as it is on the film side after film growth

    AB - We report the observation that thermoelectric thin films of La-doped SrTiO3 grown on SrTiO3 substrates yield anomalously high values of thermopower to give extraordinary values of power factor at 300 K. Thin films of Sr0.98La0.02TiO3, grown via pulsed laser deposition at low temperature and low pressure (450 °C, 10−7 Torr), do not yield similarly high values when grown on other substrates. The thin-film growth induces oxygen reduction in the SrTiO3 crystals, doping the substrate n type. It is found that the backside resistance of the SrTiO3 substrates is as low ( ∼ 12Ω/◻) as it is on the film side after film growth

    KW - IR-75214

    U2 - 10.1063/1.2916690

    DO - 10.1063/1.2916690

    M3 - Article

    VL - 92

    JO - Applied physics letters

    JF - Applied physics letters

    SN - 0003-6951

    IS - 20

    M1 - 202113

    ER -