Large electron mass anisotropy in anatase Ti1-xNb xO2 transparent conductor

Yasushi Hirose, Naoomi Yamada, Shoichiro Nakao, Taro Hitosugi, Toshihiro Shimada, Seiji Konuma, Tetsuya Hasegawa

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    (012)-oriented anatase Ti1-xNbxO2 (TNO) epitaxial films were grown on LaAlO3 (110) substrates by pulsed laser deposition technique, and electron mass (m*) of the TNO along the c-axis as well as along the a-axis were determined by polarized optical measurements with Drude analysis. The m* value of TNO (x = 0.01-0.06) along the a-axis was ∼0.6 mo, which was comparable to the electron masses of other transparent conducting materials, while m* along the c-axis was much larger, ∼2-4 m0. These results clearly indicate that TNO is more conductive along the a-axis than along the c-axis, and therefore, control of crystallographic orientation is needed for improvement in the conductivity of polycrystalline TNO films.

    Original languageEnglish
    Title of host publicationTransparent Conductors and Semiconductors for Optoelectronics
    Number of pages6
    Publication statusPublished - 2009
    Event2009 MRS Fall Meeting - Boston, MA, United States
    Duration: 2009 Nov 302009 Dec 4

    Publication series

    NameMaterials Research Society Symposium Proceedings
    ISSN (Print)0272-9172


    Other2009 MRS Fall Meeting
    Country/TerritoryUnited States
    CityBoston, MA

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering


    Dive into the research topics of 'Large electron mass anisotropy in anatase Ti1-xNb xO2 transparent conductor'. Together they form a unique fingerprint.

    Cite this