TY  - EJOUR
AU  - Martinez-Castro, Jose
AU  - Bolat, Rustem
AU  - Fan, Qitang
AU  - Werner, Simon
AU  - Arefi, Hadi
AU  - Esat, Taner
AU  - Sundermeyer, Jörg
AU  - Wagner, Christian
AU  - Gottfried, J. Michael
AU  - Temirov, Ruslan
AU  - Ternes, Markus
AU  - Tautz, F. Stefan
TI  - Disentangling the Complex Electronic Structure of an Adsorbed Nanographene: Cycloarene C108
PB  - arXiv
M1  - FZJ-2025-02318
PY  - 2021
AB  - 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.
KW  - Mesoscale and Nanoscale Physics (cond-mat.mes-hall) (Other)
KW  - FOS: Physical sciences (Other)
LB  - PUB:(DE-HGF)25
DO  - DOI:10.48550/ARXIV.2110.11449
UR  - https://juser.fz-juelich.de/record/1041579
ER  -