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

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4 Citations (Scopus)


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
Publication statusPublished - 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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