Ultrafast intersystem crossings in Fe-Co Prussian blue analogues
- Northern Illinois Univ., DeKalb, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Ultrafast spincrossover is studied in Fe-Co Prussian blue analogues using a dissipative quantum-mechanical model of a cobalt ion coupled to a breathing mode. All electronic interactions are treated on an equal footing. It is theoretically demonstrated that the divalent cobalt ion reaches 90% of the S = 3/2 value within 20 fs after photoexciting a low-spin Co3+ ion by an iron-to-cobalt charge transfer. The doublet-to-quartet spin crossover is significantly faster than the oscillation period of the breathing mode. The system relaxes to the lowest manifold of divalent cobalt (4T1) in 150-200 fs. In conclusion, strong oscillations in spin-orbit coupling and the involvement of higher-lying quartets are found.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences and Engineering Division; Northern Illinois University, Institute for Nanoscience, Engineering and Technology
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1393194
- Journal Information:
- Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Photoinduced valence tautomerism of a cobalt-dioxolene complex revealed with femtosecond M-edge XANES
|
journal | September 2019 |
Dissipation and dynamics in ultrafast intersystem crossings
|
journal | January 2020 |
Deactivation of Excited States in Transition-Metal Complexes: Insight from Computational Chemistry
|
journal | November 2018 |
Similar Records
Ultrafast Spin Crossover in a Room-Temperature Ferrimagnet: Element-Specific Spin Dynamics in Photoexcited Cobalt Ferrite
First principles calculation of a large variation in dielectric tensor through the spin crossover in the CsFe[Cr(CN){sub 6}] Prussian blue analogue