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

被引：144
|
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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