Ultrafast orbital tomography of a pentacene film using time-resolved momentum microscopy at a FEL.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
18 May 2022
18 May 2022
Historique:
received:
09
07
2020
accepted:
28
04
2022
entrez:
18
5
2022
pubmed:
19
5
2022
medline:
19
5
2022
Statut:
epublish
Résumé
Time-resolved momentum microscopy provides insight into the ultrafast interplay between structural and electronic dynamics. Here we extend orbital tomography into the time domain in combination with time-resolved momentum microscopy at a free-electron laser (FEL) to follow transient photoelectron momentum maps of excited states of a bilayer pentacene film on Ag(110). We use optical pump and FEL probe pulses by keeping FEL source conditions to minimize space charge effects and radiation damage. From the momentum microscopy signal, we obtain time-dependent momentum maps of the excited-state dynamics of both pentacene layers separately. In a combined experimental and theoretical study, we interpret the observed signal for the bottom layer as resulting from the charge redistribution between the molecule and the substrate induced by excitation. We identify that the dynamics of the top pentacene layer resembles excited-state molecular dynamics.
Identifiants
pubmed: 35585096
doi: 10.1038/s41467-022-30404-6
pii: 10.1038/s41467-022-30404-6
pmc: PMC9117673
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2741Subventions
Organisme : Deutsche Forschungsgemeinschaft (German Research Foundation)
ID : EXC 2147
Organisme : Deutsche Forschungsgemeinschaft (German Research Foundation)
ID : DFG EXC 1074
Organisme : Deutsche Forschungsgemeinschaft (German Research Foundation)
ID : SCHO1260/4-2
Organisme : Deutsche Forschungsgemeinschaft (German Research Foundation)
ID : RE1469/12-2
Informations de copyright
© 2022. The Author(s).
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