1. Direct observation of collective modes coupled to molecular orbital-driven charge transfer.
- Author
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Tadahiko Ishikawa, Hayes, Stuart A., Keskin, Sercan, Corthey, Gastón, Masaki Hada, Pichugin, Kostyantyn, Marx, Alexander, Hirscht, Julian, Kenta Shionuma, Ken Onda, Yoichi Okimoto, Shin-ya Koshihara, Takashi Yamamoto, Hengbo Cui, Mitsushiro Nomura, Yugo Oshima, Abdel-Jawad, Majed, Kato, Reizo, and Miller, R. J. Dwayne
- Subjects
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PHOTOINDUCED electron transfer , *CHARGE transfer , *PHASE transitions , *MOLECULAR crystals , *FEMTOSECOND lasers , *ELECTRON diffraction - Abstract
Correlated electron systems can undergo ultrafast photoinduced phase transitions involving concerted transformations of electronic and lattice structure. Understanding these phenomena requires identifying the key structural modes that couple to the electronic states.We report the ultrafast photoresponse of the molecular crystal Me4P[Pt(dmit)2]2, which exhibits a photoinduced charge transfer similar to transitions between thermally accessible states, and demonstrate how femtosecond electron diffraction can be applied to directly observe the associatedmolecularmotions. Even for such a complex system, the key large-amplitudemodes can be identified by eye and involve a dimer expansion and a librationalmode.The dynamics are consistent with the time-resolved optical study, revealing how the electronic, molecular, and lattice structures together facilitate ultrafast switching of the state. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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