Ultrafast insulator-to-metal switching by photoinduced Mott transition

Shinichiro Iwai, Y. Okimoto, M. Ono, H. Matsuzaki, A. Maeda, H. Kishida, H. Okamoto, Y. Tokura

Research output: Contribution to journalArticlepeer-review


We demonstrated the ultrafast photoinduced Mott transition from a charge transfer (CT) insulator to a metal in a halogen-bridged Ni chain compound by visible-mid IR pump-probe reflection spectroscopy. Upon the excitation of the CT band, the spectral weight of the gap transition is transferred to the inner-gap region. When the excitation density exceeds 0.1 per Ni site, the Drude-like high-reflection band appears in the infrared region, indicating the formation of a metallic state. The photogeneration of the metallic state and the subsequent recovery of the original insulating state occur within a few picoseconds.

Original languageEnglish
Pages (from-to)340-342
Number of pages3
JournalSpringer Series in Chemical Physics
Publication statusPublished - 2004 Dec 1

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry


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