Ultrafast optical switching to a metallic state by photoinduced Mott transition in a halogen-bridged nickel-chain compound

被引：287

作者：

Iwai, S ^{[1
]}

Ono, M

Maeda, A

Matsuzaki, H

Kishida, H

Okamoto, H

Tokura, Y

机构：

[1] Natl Inst Adv Ind Sci & Technol, CERC, AIST, Tsukuba, Ibaraki 3058564, Japan

[2] PRESTO, Nanostruct & Mat Property Grp, Kawaguchi 3320012, Japan

[3] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba 2278562, Japan

[4] PRESTO, Struct Ordering & Phys Properties Grp, Kawaguchi 3320012, Japan

[5] PRESTO, Struct & Transformat Grp, Kawaguchi 3320012, Japan

[6] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.91.057401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate the ultrafast photoinduced Mott transition from a charge transfer insulator to a metal in a halogen-bridged Ni-chain compound by pump-probe reflection spectroscopy. Upon the irradiation of a 130-femtosecond laser pulse, the spectral weight of the gap transition is transferred to the inner-gap region. When the photoexcitation density exceeds 0.1/Ni site, the Drude-like high-reflection band appears in the infrared region, signaling the formation of a metallic state. The photogeneration of the metallic state and the subsequent recovery to the original gapped state occur within a few picoseconds.

引用

页数：4

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