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@ARTICLE{Wallauer:891059,
      author       = {Wallauer, R. and Raths, M. and Stallberg, K. and Münster,
                      L. and Brandstetter, D. and Yang, X. and Güdde, J. and
                      Puschnig, P. and Soubatch, S. and Kumpf, C. and Bocquet, F.
                      C. and Tautz, F. S. and Höfer, U.},
      title        = {{T}racing orbital images on ultrafast time scales},
      journal      = {Science / Science now},
      volume       = {371},
      number       = {6533},
      issn         = {1095-9203},
      address      = {Washington, DC},
      publisher    = {Assoc.73085},
      reportid     = {FZJ-2021-01342},
      pages        = {1056 - 1059},
      year         = {2021},
      abstract     = {Frontier orbitals determine fundamental molecular
                      properties such as chemical reactivities. Although electron
                      distributions of occupied orbitals can be imaged in momentum
                      space by photoemission tomography, it has so far been
                      impossible to follow the momentum-space dynamics of a
                      molecular orbital in time, for example, through an
                      excitation or a chemical reaction. Here, we combined
                      time-resolved photoemission using high laser harmonics and a
                      momentum microscope to establish a tomographic, femtosecond
                      pump-probe experiment of unoccupied molecular orbitals. We
                      measured the full momentum-space distribution of transiently
                      excited electrons, connecting their excited-state dynamics
                      to real-space excitation pathways. Because in molecules this
                      distribution is closely linked to orbital shapes, our
                      experiment may, in the future, offer the possibility of
                      observing ultrafast electron motion in time and space.},
      cin          = {PGI-3},
      ddc          = {320},
      cid          = {I:(DE-Juel1)PGI-3-20110106},
      pnm          = {521 - Quantum Materials (POF4-521) / DFG project 396769409
                      - Grundlagen der Photoemissionstomographie},
      pid          = {G:(DE-HGF)POF4-521 / G:(GEPRIS)396769409},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {33602865},
      UT           = {WOS:000625876100056},
      doi          = {10.1126/science.abf3286},
      url          = {https://juser.fz-juelich.de/record/891059},
}