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

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

Okamoto, H; Matsuzaki, H; Wakabayashi, T; Takahashi, Y; Hasegawa, T

Physical review letters, 01/2007, Volume: 98, Issue: 3

Journal Article

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-F2TCNQ). 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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Okamoto, H | Matsuzaki, H | Wakabayashi, T | Takahashi, Y | Hasegawa, T

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