Photoinduced insulator-metal transition in Pr0.5Ca 0.5CoO3 as studied by femtosecond spectroscopy

Yoichi Okimoto; Xianzhou Peng; Mieko Tamura; Takaaki Morita; Ken Onda; Tadahiko Ishikawa; Shin Ya Koshihara; Naoyuki Todoroki; Toru Kyomen; Mitsuru Itoh

doi:10.1088/1742-6596/148/1/012019

Photoinduced insulator-metal transition in Pr_0.5Ca _0.5CoO₃ as studied by femtosecond spectroscopy

Yoichi Okimoto, Xianzhou Peng, Mieko Tamura, Takaaki Morita, Ken Onda, Tadahiko Ishikawa, Shin Ya Koshihara, Naoyuki Todoroki, Toru Kyomen, Mitsuru Itoh

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Ultrafast optical response has been investigated using fs laser system on a perovskite-type cobalt oxide, Pr_0.5Ca_0.5CoO₃ which undergoes the insulator-metal transition at 89 K. After the photo-irradiation at 30 K, the reflectivity shows a sudden increase. The ultrafast reflectance changes are quantitatively reproduced by the numerical calculation considering the linear combination of the dielectric functions of the initial insulating and the final metallic state, indicating ultrafast phase transition on the time scale of femtosecond.

Original language	English
Article number	012019
Journal	Journal of Physics: Conference Series
Volume	148
DOIs	https://doi.org/10.1088/1742-6596/148/1/012019
Publication status	Published - Jan 1 2009
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1088/1742-6596/148/1/012019

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Photoinduced insulator-metal transition in Pr_0.5Ca _0.5CoO₃ as studied by femtosecond spectroscopy. / Okimoto, Yoichi; Peng, Xianzhou; Tamura, Mieko; Morita, Takaaki; Onda, Ken; Ishikawa, Tadahiko; Koshihara, Shin Ya; Todoroki, Naoyuki; Kyomen, Toru; Itoh, Mitsuru.

In: Journal of Physics: Conference Series, Vol. 148, 012019, 01.01.2009.

Research output: Contribution to journal › Article › peer-review

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abstract = "Ultrafast optical response has been investigated using fs laser system on a perovskite-type cobalt oxide, Pr0.5Ca0.5CoO3 which undergoes the insulator-metal transition at 89 K. After the photo-irradiation at 30 K, the reflectivity shows a sudden increase. The ultrafast reflectance changes are quantitatively reproduced by the numerical calculation considering the linear combination of the dielectric functions of the initial insulating and the final metallic state, indicating ultrafast phase transition on the time scale of femtosecond.",

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AU - Onda, Ken

AU - Ishikawa, Tadahiko

AU - Koshihara, Shin Ya

AU - Todoroki, Naoyuki

AU - Kyomen, Toru

AU - Itoh, Mitsuru

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