Photoinduced metallic state mediated by spin-charge separation in a one-dimensional organic mott insulator

被引：148

作者：

Okamoto, H. ^{[1
]}

Matsuzaki, H.

Wakabayashi, T.

Takahashi, Y.

Hasegawa, T.

机构：

[1] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba 2778561, Japan

[2] AIST, CERC, Tsukuba, Ibaraki 3058562, Japan

[3] CREST, JST, Kawagoe, Saitama 3320012, Japan

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.98.037401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Charge dynamics in a one-dimensional (1D) Mott insulator was investigated by fs pump-probe reflection spectroscopy on an organic charge-transfer compound, bis(ethylenedithio)tetrathiafulvalene-difluorotetracyanoquinodimethane (ET-F(2)TCNQ). The analyses of the transient reflectivity changes demonstrate that low-energy spectral weight induced by photocarrier doping is concentrated on a Drude component being independent of the doping density, and midgap state is never formed. Such phenomena can be explained by the concept of spin-charge separation characteristic of 1D correlated electron systems.

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页数：4

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