Journal
SCIENCE
Volume 350, Issue 6267, Pages 1501-1505Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aab3480
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Funding
- Max Planck Society
- Centre for Free Electron Laser Science
- Hamburg Centre for Ultrafast Imaging
- Ministry of Education, Culture, Supports, Science, and Technology of Japan [15H02103]
- CREST, JST [15H02103]
- Alexander von Humboldt Foundation
- Japan Science Technology Agency (JST), PRESTO
- Grants-in-Aid for Scientific Research [15H02103] Funding Source: KAKEN
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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 associated molecular motions. Even for such a complex system, the key large-amplitude modes can be identified by eye and involve a dimer expansion and a librational mode. 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.
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