| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1518147 | Journal of Physics and Chemistry of Solids | 2008 | 4 Pages |
Abstract
Ultrafast dynamics of the photoinduced insulator (I) to metal (M) transition were investigated using femtosecond mid-infrared pump–probe spectroscopy in two-dimensional organic Mott insulators [bis (ethylenedithio)]-tetrathiafulvalene (BEDT-TTF) salts κ-(BEDT-TTF)2X (κ-(ET)2X, where X denotes anion). In κ-(d-ET)2Cu[N(CN)2]Br, a metallic state was photogenerated using a phonon-mediated mechanism: the effective bandwidth increases through the photoinduced molecular rearrangement. The mechanism differs fundamentally from the previously reported photoinduced filling control in one-dimensional Mott insulators.
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Authors
Y. Kawakami, H. Nakaya, S. Iwai, N. Yoneyama, T. Sasaki, N. Kobayashi,