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

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

SCI - Physics

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

Abstract

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 language	English
Pages (from-to)	340-342
Number of pages	3
Journal	Springer Series in Chemical Physics
Volume	79
Publication status	Published - 2004 Dec 1

ASJC Scopus subject areas

Physical and Theoretical Chemistry

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title = "Ultrafast insulator-to-metal switching by photoinduced Mott transition",

abstract = "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.",

author = "Shinichiro Iwai and Y. Okimoto and M. Ono and H. Matsuzaki and A. Maeda and H. Kishida and H. Okamoto and Y. Tokura",

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pages = "340--342",

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TY - JOUR

T1 - Ultrafast insulator-to-metal switching by photoinduced Mott transition

AU - Iwai, Shinichiro

AU - Okimoto, Y.

AU - Ono, M.

AU - Matsuzaki, H.

AU - Maeda, A.

AU - Kishida, H.

AU - Okamoto, H.

AU - Tokura, Y.

PY - 2004/12/1

Y1 - 2004/12/1

N2 - 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.

AB - 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.

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VL - 79

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EP - 342

JO - Springer Series in Chemical Physics

JF - Springer Series in Chemical Physics

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