Photoinduced dynamics in doped Mott insulators with polaronic conduction

Ba2Ti13 O22 and BaxTi8 O16

N. Yamaguchi, A. Furuhashi, H. Nishihara, R. Murata, K. Takayama, Takuro Katsufuji

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    To clarify the dynamics of polarons in doped Mott insulators, we performed pump-probe reflectivity measurements for two barium titanates, Ba2Ti13O22 and BaxTi8O16, with a noninteger average number of d electrons per Ti. We found that the photoinduced dynamics in Ba2Ti13O22 with a three-dimensional electronic structure is characterized by a broadening of the polaron-excitation peak immediately after photoirradiation, whereas that in BaxTi8O16 with a one-dimensional electronic structure is characterized by a change in the intensities of the polaron-excitation peak and charge-gap-excitation peak with time. This indicates that a difference in dimensionality results in different photoinduced dynamics of polarons in doped Mott insulators.

    Original languageEnglish
    Article number045119
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume94
    Issue number4
    DOIs
    Publication statusPublished - 2016 Jul 15

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    Gene Conversion
    Polarons
    insulators
    polarons
    conduction
    Electronic structure
    barium titanates
    electronic structure
    excitation
    Barium
    Pumps
    pumps
    reflectance
    Electrons
    probes
    electrons

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Photoinduced dynamics in doped Mott insulators with polaronic conduction : Ba2Ti13 O22 and BaxTi8 O16. / Yamaguchi, N.; Furuhashi, A.; Nishihara, H.; Murata, R.; Takayama, K.; Katsufuji, Takuro.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 94, No. 4, 045119, 15.07.2016.

    Research output: Contribution to journalArticle

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    AU - Takayama, K.

    AU - Katsufuji, Takuro

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