Disentangling the Complex Electronic Structure of an Adsorbed Nanographene: Cycloarene C108
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2021
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| _version_ | 1866910314789863424 |
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| author | Martinez-Castro, Jose Bolat, Rustem Fan, Qitang Werner, Simon Arefi, Hadi H. Esat, Taner Sundermeyer, Jörg Wagner, Christian Gottfried, J. Michael Temirov, Ruslan Ternes, Markus Tautz, F. Stefan |
| author_facet | Martinez-Castro, Jose Bolat, Rustem Fan, Qitang Werner, Simon Arefi, Hadi H. Esat, Taner Sundermeyer, Jörg Wagner, Christian Gottfried, J. Michael Temirov, Ruslan Ternes, Markus Tautz, F. Stefan |
| contents | 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2110_11449 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Disentangling the Complex Electronic Structure of an Adsorbed Nanographene: Cycloarene C108 Martinez-Castro, Jose Bolat, Rustem Fan, Qitang Werner, Simon Arefi, Hadi H. Esat, Taner Sundermeyer, Jörg Wagner, Christian Gottfried, J. Michael Temirov, Ruslan Ternes, Markus Tautz, F. Stefan Mesoscale and Nanoscale Physics 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. |
| title | Disentangling the Complex Electronic Structure of an Adsorbed Nanographene: Cycloarene C108 |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2110.11449 |