Correlation of Kondo effect and molecular conformation of the acceptor molecule in the TTF-TCNE charge transfer complex
| Autor: | P. Stoll, Janina N. Ladenthin, Christian Lotze, I. Fernandez-Torrente, Tobias R. Umbach, Katharina J. Franke |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Kondo effect
FOS: Physical sciences 02 engineering and technology Tetracyanoethylene 01 natural sciences chemistry.chemical_compound 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Molecule General Materials Science 010306 general physics HOMO/LUMO Physics Condensed Matter - Mesoscale and Nanoscale Physics TTF-TCNE 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik 021001 nanoscience & nanotechnology Condensed Matter Physics Charge-transfer complex Resonance (chemistry) Acceptor Crystallography chemistry acceptor molecule 0210 nano-technology Tetrathiafulvalene |
| Popis: | A Kondo resonance has been observed on purely organic molecules in several combinations of charge transfer complexes on a metal surface. It has been regarded as a fingerprint of the transfer of one electron from the donor to the extended $\pi$ orbital of the acceptor's LUMO. Here, we investigate the stoichiometric checkerboard structure of tetrathiafulvalene (TTF) and tetracyanoethylene (TCNE) on a Au(111) surface using scanning tunneling and atomic force microscopy at 4.8 K. We find a bistable state of the TCNE molecules with distinct structural and electronic properties. The two states represent different conformations of the TCNE within the structure. One of them exhibits a Kondo resonance, whereas the other one does not, despite of both TCNE types being singly charged. |
| Databáze: | OpenAIRE |
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