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

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    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

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

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