| Autor: |
Servol, Marina, Moisan, Nicolas, Collet, Eric, Cailleau, Hervé, Kaszub, Wawrzyniec, Toupet, Loïc, Boschetto, Davide, Ishikawa, Tadahiko, Moréac, Alain, Koshihara, Shinya, Maesato, Mitsuhiko, Uruichi, Mikio, Shao, Xiangfeng, Nakano, Yoshiaki, Yamochi, Hideki, Saito, Gunzi, Lorenc, Maciej |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Zdroj: |
Physical Review B - Condensed Matter and Materials Physics. 92 |
| ISSN: |
1550-235X |
| Popis: |
The family of materials (EDO-TTF)2XF6 represents quasi-one-dimensional quarter filled systems exhibiting insulator-to-metal (I-M) phase transition at thermal equilibrium. (EDO-TTF)2PF6 is known to undergo a photoinduced I-M conversion with cooperative response to light excitation. Here we use femtosecond pump-probe experiments to study the photoresponse of (EDO-TTF)2SbF6 made of a larger counteranion SbF6 compared to the well studied (EDO-TTF)2PF6. In the early stage of the photoinduced process, we reveal a multicomponent coherent oscillating feature. The evolution of this feature with excitation density and temperature points to the local nature of the photoswitching in (EDO-TTF)2SbF6. At longer time scale, we did not detect the features associated with the transformation to the M phase, albeit observed in the PF6 derivative. We propose a scenario whereby the bigger size of the counteranion in (EDO-TTF)2SbF6 hinders the establishment of this transformation at macroscopic scale. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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