Unusually large enhancement of thermopower in an electric field induced two-dimensional electron gas

Hiromichi Ohta, Taku Mizuno, Shijian Zheng, Takeharu Kato, Yuichi Ikuhara, Katsumi Abe, Hideya Kumomi, Kenji Nomura, Hideo Hosono

    Research output: Contribution to journalArticle

    58 Citations (Scopus)

    Abstract

    Unusually large thermopower modulation is demonstrated using a field effect transistor structure on a thermoelectric material. An electric field application provides an extremely thin (μ2 nm) two-dimensional electron gas (2DEG), which exhibits unusually large thermopower, approximately five times larger than that of the bulk. The present electric field induced 2DEG approach may accelerate the development of nanostructures for high performance thermoelectric materials.

    Original languageEnglish
    Pages (from-to)740-744
    Number of pages5
    JournalAdvanced Materials
    Volume24
    Issue number6
    DOIs
    Publication statusPublished - 2012 Feb 7

    Keywords

    • SrTiO
    • electric field modulation
    • thermopower
    • two-dimensional electron gas

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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  • Cite this

    Ohta, H., Mizuno, T., Zheng, S., Kato, T., Ikuhara, Y., Abe, K., Kumomi, H., Nomura, K., & Hosono, H. (2012). Unusually large enhancement of thermopower in an electric field induced two-dimensional electron gas. Advanced Materials, 24(6), 740-744. https://doi.org/10.1002/adma.201103809