Temperature dependence of the photoinduced dynamics on the cleaved surface of BaV10O15

Ayaka Nogami, Tatsuya Kanzaki, Asuka Furuhashi, Takuro Katsufuji

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    Abstract

    The temperature dependence of the photoinduced dynamics by the irradiation of a femtosecond laser pulse was studied for the cleaved surface of BaV 10O15, which shows V trimerization with orbital ordering at Tc = 123 K. For T > Tc , the photoinduced reflectivity change exhibits oscillation with time, indicating that a photoinduced state propagates with time in the crystal. For T < Tc, almost time-independent behavior after the instantaneous change of the reflectivity is observed over several tens of picoseconds, indicating the appearance of a stable photoinduced phase. The different photoinduced dynamics above and below Tc can be attributed to the absence or existence of V trimerization with orbital ordering. We also found that the absolute values of the photoinduced reflectivity change are several times larger on the cleaved surface than those on the polished surface, indicating that remnant stress on the polished surface affects the photoinduced dynamics.

    Original languageEnglish
    Article number034713
    JournalJournal of the Physical Society of Japan
    Volume82
    Issue number3
    DOIs
    Publication statusPublished - 2013 Mar

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    Keywords

    • Orbital ordering
    • Photoinduced phase transition
    • Pump-probe measurement

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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