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Journal Article

Ultrafast Transfer and Transient Entrapment of Photoexcited Mg Electron in Mg@C-60


Madjet,  Mohamed El-Amine
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Madjet, M.-E.-A., Ali, E., Carignano, M., Vendrell, O., & Chakraborty, H. S. (2021). Ultrafast Transfer and Transient Entrapment of Photoexcited Mg Electron in Mg@C-60. Physical Review Letters, 126(18): 183002. doi:10.1103/PhysRevLett.126.183002.

Cite as: https://hdl.handle.net/21.11116/0000-0008-F106-1
Electron relaxation is studied in endofullerene Mg@C-60 after an initial localized photoexcitation in Mg by nonadiabatic molecular dynamics simulations. Two approaches to the electronic structure of the excited electronic states are used: (i) an independent particle approximation based on a density-functional theory description of molecular orbitals and (ii) a configuration-interaction description of the many-body effects. Both methods exhibit similar relaxation times, leading to an ultrafast decay and charge transfer from Mg to C-60 within tens of femtoseconds. Method (i) further elicits a transient trap of the transferred electron that can delay the electron-hole recombination. Results shall motivate experiments to probe these ultrafast processes by two-photon transient absorption or photoelectron spectroscopy in gas phase, in solution, or as thin films.