Direct observation of collective modes coupled to molecular orbital-driven charge transfer.

Saved in:

Bibliographic Details
Title:	Direct observation of collective modes coupled to molecular orbital-driven charge transfer.
Authors:	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, Miller, R. J. Dwayne
Source:	Science (pre-March 2025). 12/18/2015, Vol. 350 Issue 6267, p1501-1505. 5p.
Subjects:	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]
	Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Psychology and Behavioral Sciences Collection

Description
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]
ISSN:	00368075
DOI:	10.1126/science.aab3480