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@ARTICLE{MartinezCastro:1041579,
      author       = {Martinez-Castro, Jose and Bolat, Rustem and Fan, Qitang and
                      Werner, Simon and Arefi, Hadi and Esat, Taner and
                      Sundermeyer, Jörg and Wagner, Christian and Gottfried, J.
                      Michael and Temirov, Ruslan and Ternes, Markus and Tautz, F.
                      Stefan},
      title        = {{D}isentangling the {C}omplex {E}lectronic {S}tructure of
                      an {A}dsorbed {N}anographene: {C}ycloarene {C}108},
      publisher    = {arXiv},
      reportid     = {FZJ-2025-02318},
      year         = {2021},
      abstract     = {We combine low-temperature scanning tunneling spectroscopy,
                      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
                      without introducing spurious artifacts. 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 characterization of
                      complex molecules and other physical entities which have
                      electronic resonances in the tip-sample junction.},
      keywords     = {Mesoscale and Nanoscale Physics (cond-mat.mes-hall) (Other)
                      / FOS: Physical sciences (Other)},
      cin          = {PGI-3},
      cid          = {I:(DE-Juel1)PGI-3-20110106},
      pnm          = {5213 - Quantum Nanoscience (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5213},
      typ          = {PUB:(DE-HGF)25},
      doi          = {10.48550/ARXIV.2110.11449},
      url          = {https://juser.fz-juelich.de/record/1041579},
}