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@ARTICLE{MartinezCastro:910866,
      author       = {Martinez-Castro, Jose and Bolat, Rustem and Fan, Qitang and
                      Werner, Simon and Arefi, Hadi H. and Esat, Taner and
                      Sundermeyer, Jörg and Wagner, Christian and Michael
                      Gottfried, J. and Temirov, Ruslan and Ternes, Markus and
                      Stefan Tautz, F.},
      title        = {{D}isentangling the electronic structure of an adsorbed
                      graphene nanoring by scanning tunneling microscopy},
      journal      = {Communications materials},
      volume       = {3},
      number       = {1},
      issn         = {2662-4443},
      address      = {London},
      publisher    = {Springer Nature},
      reportid     = {FZJ-2022-04216},
      pages        = {57},
      year         = {2022},
      abstract     = {Graphene nanorings are promising model structures to
                      realize persistent ring currents and Aharonov–Bohm effect
                      at the single molecular level. To investigate such
                      intriguing effects, precise molecular characterization is
                      crucial. Here, we combine low-temperature scanning tunneling
                      imaging and spectroscopy with CO functionalized tips and
                      algorithmic data analysis to investigate the electronic
                      structure of the molecular cycloarene C108 (graphene
                      nanoring) adsorbed on a Au(111) surface. We demonstrate that
                      CO functionalized tips enhance the visibility of molecular
                      resonances, both in differential conductance spectra and in
                      real-space topographic images. Comparing our experimental
                      data with ab-initio density functional theory reveals a
                      remarkably precise agreement of the molecular orbitals and
                      enables us to disentangle close-lying molecular states only
                      separated by 50 meV at an energy of 2 eV below the Fermi
                      level. We propose this combination of techniques as a
                      promising new route for a precise electronic
                      characterization of complex molecules and other physical
                      properties which have electronic resonances in the
                      tip-sample junction.},
      cin          = {PGI-3 / JARA-FIT},
      ddc          = {600},
      cid          = {I:(DE-Juel1)PGI-3-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {5213 - Quantum Nanoscience (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5213},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000844772400001},
      doi          = {10.1038/s43246-022-00275-x},
      url          = {https://juser.fz-juelich.de/record/910866},
}