Photoinduced metal-to-insulator transition in a manganite thin film.
A persistent photoinduced metal-to-insulator transition has been confirmed in a manganite thin film, Pr_(0.55)(Ca_(0.75)Sr_(0.25))_(0.45)MnO3, near a multicritical point by monitoring with transport measurements and x-ray photoemission spectroscopy. Together with the previously reported reverse effect, the photoinduced insulator-to-metal transition, it is found that the relative stability of the metallic and insulating phases interchanges around 80 K in the middle of a very wide hysteresis loop, which is a manifestation of the large potential barrier due to the long-range elastic energy. It is shown that photons are much more effective in overcoming the barrier via the electronically excited intermediate states than via the heat mode.
Takubo
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N
Research Center for Advanced Science and Technology (RCAST), University of Tokyo, Tokyo, Japan.
Onishi
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I
Takubo
K
K
Mizokawa
T
T
Miyano
K
K