Charge transport through extended molecular wires with strongly correlated electrons.
Chem Sci
; 12(33): 11121-11129, 2021 Aug 25.
Article
en En
| MEDLINE
| ID: mdl-34522309
ABSTRACT
Electron-electron interactions are at the heart of chemistry and understanding how to control them is crucial for the development of molecular-scale electronic devices. Here, we investigate single-electron tunneling through a redox-active edge-fused porphyrin trimer and demonstrate that its transport behavior is well described by the Hubbard dimer model, providing insights into the role of electron-electron interactions in charge transport. In particular, we empirically determine the molecule's on-site and inter-site electron-electron repulsion energies, which are in good agreement with density functional calculations, and establish the molecular electronic structure within various oxidation states. The gate-dependent rectification behavior confirms the selection rules and state degeneracies deduced from the Hubbard model. We demonstrate that current flow through the molecule is governed by a non-trivial set of vibrationally coupled electronic transitions between various many-body ground and excited states, and experimentally confirm the importance of electron-electron interactions in single-molecule devices.
Texto completo:
1
Base de datos:
MEDLINE
Idioma:
En
Revista:
Chem Sci
Año:
2021
Tipo del documento:
Article