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Title: Local response to light excitation in the charge-ordered phase of (EDO-TTF)2Sb F6
Authors: Servol, Marina
Moisan, Nicolas
Collet, Eric
Cailleau, Hervé
Kaszub, Wawrzyniec
Toupet, Loïc
Boschetto, Davide
Ishikawa, Tadahiko
Moréac, Alain
Koshihara, Shinya
Maesato, Mitsuhiko  kyouindb  KAKEN_id
Uruichi, Mikio
Shao, Xiangfeng
Nakano, Yoshiaki  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-3616-7286 (unconfirmed)
Yamochi, Hideki
Saito, Gunzi
Lorenc, Maciej
Author's alias: 中野, 義明
前里, 光彦
矢持, 秀起
Issue Date: 24-Jul-2015
Publisher: American Physical Society
Journal title: Physical Review B - Condensed Matter and Materials Physics
Volume: 92
Thesis number: 024304
Abstract: 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.
Rights: © 2015 American Physical Society.
URI: http://hdl.handle.net/2433/218971
DOI(Published Version): 10.1103/PhysRevB.92.024304
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