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@ARTICLE{Nakayama:1038812,
      author       = {Nakayama, Yasuo and Bocquet, François C. and Tsuruta,
                      Ryohei and Soubatch, Serguei and Tautz, F. Stefan},
      title        = {{A}nisotropic dispersion of excitonic bands of the
                      single-crystal pentacene (001) surface as measured by
                      low-energy angle-resolved high-resolution electron
                      energy-loss spectroscopy},
      journal      = {Journal of electron spectroscopy and related phenomena},
      volume       = {279},
      issn         = {0368-2048},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2025-01649},
      pages        = {147514},
      year         = {2025},
      abstract     = {Low-energy high-resolution electron energy-loss
                      spectroscopy (HREELS) is a useful technique for the
                      charac-terization of various excitation processes at solid
                      surfaces. However, no successful work has been reported
                      onmolecular single-crystal samples yet. In the present
                      study, low-energy angle-resolved HREELS measurementswere
                      conducted on single-crystal pentacene, an organic
                      semiconductor. The results confirmed the excitonicbands
                      exhibiting energy–momentum dispersion and anisotropy of
                      these depending on the surface crystallo-graphic directions,
                      corroborating the occurrence of exciton delocalization,
                      contrary to the ordinary notion of theFrenkel exciton for
                      weakly interacting van der Waals molecular solids. The
                      present results demonstrate that low-energy angle-resolved
                      HREELS is applicable to the precise examination of the
                      excitonic characteristics of solid-state surfaces, even for
                      molecular semiconductor single crystals.},
      cin          = {PGI-3},
      ddc          = {620},
      cid          = {I:(DE-Juel1)PGI-3-20110106},
      pnm          = {5213 - Quantum Nanoscience (POF4-521) / Orbital Cinema -
                      Photoemission Orbital Cinematography: An ultrafast wave
                      function lab (101071259) / SFB 1083 A12 - Struktur und
                      Anregungen von hetero-epitaktischen Schichtsystemen aus
                      schwach wechselwirkenden 2D-Materialien und molekularen
                      Schichten (A12) (385975694)},
      pid          = {G:(DE-HGF)POF4-5213 / G:(EU-Grant)101071259 /
                      G:(GEPRIS)385975694},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001420630000001},
      doi          = {10.1016/j.elspec.2025.147514},
      url          = {https://juser.fz-juelich.de/record/1038812},
}