Ultrafast orbital tomography of a pentacene film using time-resolved momentum microscopy at a FEL

Kiana Baumgärtner, Marvin Reuner, Christian Metzger, Dmytro Kutnyakhov, Michael Heber, Federico Pressacco, Chul-Hee Min, Thiago R. F. Peixoto, Mario Reiser, Chan Kim, Wei Lu, Roman Shayduk, Manuel Izquierdo, Günter Brenner, Friedrich Roth, Achim Schöll, Serguei Molodtsov, Wilfried Wurth, Friedrich Reinert, Anders Madsen, Daria Popova-Gorelova and Markus Scholz ()
Additional contact information
Kiana Baumgärtner: Julius-Maximilians-Universität Würzburg, Am Hubland
Marvin Reuner: Universität Hamburg
Christian Metzger: Julius-Maximilians-Universität Würzburg, Am Hubland
Dmytro Kutnyakhov: Deutsches Elektronen-Synchrotron DESY
Michael Heber: Deutsches Elektronen-Synchrotron DESY
Federico Pressacco: Deutsches Elektronen-Synchrotron DESY
Chul-Hee Min: Julius-Maximilians-Universität Würzburg, Am Hubland
Thiago R. F. Peixoto: Julius-Maximilians-Universität Würzburg, Am Hubland
Mario Reiser: European X-Ray Free-Electron Laser Facility
Chan Kim: European X-Ray Free-Electron Laser Facility
Wei Lu: European X-Ray Free-Electron Laser Facility
Roman Shayduk: European X-Ray Free-Electron Laser Facility
Manuel Izquierdo: European X-Ray Free-Electron Laser Facility
Günter Brenner: Deutsches Elektronen-Synchrotron DESY
Friedrich Roth: TU Bergakademie Freiberg
Achim Schöll: Julius-Maximilians-Universität Würzburg, Am Hubland
Serguei Molodtsov: European X-Ray Free-Electron Laser Facility
Wilfried Wurth: Deutsches Elektronen-Synchrotron DESY
Friedrich Reinert: Julius-Maximilians-Universität Würzburg, Am Hubland
Anders Madsen: European X-Ray Free-Electron Laser Facility
Daria Popova-Gorelova: Universität Hamburg
Markus Scholz: Deutsches Elektronen-Synchrotron DESY

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract 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.

Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30404-6

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DOI: 10.1038/s41467-022-30404-6

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