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

Research output: Contribution to journalArticle

3 Citations (Scopus)

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.

Original languageEnglish
Article number012019
JournalJournal of Physics: Conference Series
Volume148
DOIs
Publication statusPublished - Jan 1 2009
Externally publishedYes

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transition metals
insulators
reflectance
cobalt oxides
spectroscopy
irradiation
lasers

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Photoinduced insulator-metal transition in Pr0.5Ca 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 journalArticle

Okimoto, Y, Peng, X, Tamura, M, Morita, T, Onda, K, Ishikawa, T, Koshihara, SY, Todoroki, N, Kyomen, T & Itoh, M 2009, 'Photoinduced insulator-metal transition in Pr0.5Ca 0.5CoO3 as studied by femtosecond spectroscopy', Journal of Physics: Conference Series, vol. 148, 012019. https://doi.org/10.1088/1742-6596/148/1/012019
Okimoto, Yoichi ; Peng, Xianzhou ; Tamura, Mieko ; Morita, Takaaki ; Onda, Ken ; Ishikawa, Tadahiko ; Koshihara, Shin Ya ; Todoroki, Naoyuki ; Kyomen, Toru ; Itoh, Mitsuru. / Photoinduced insulator-metal transition in Pr0.5Ca 0.5CoO3 as studied by femtosecond spectroscopy. In: Journal of Physics: Conference Series. 2009 ; Vol. 148.
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