Frankerl, Moritz and Patera, Laerte L. and Giselbrecht, Felix and Frederiksen, Thomas and Repp, Jascha and Donarini, Andrea (2025) Substrate Polarization Alters the Jahn-Teller Effect in a Single Molecule. PHYSICAL REVIEW LETTERS, 134 (17): 176203. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
Charge-state transitions of a single Cu-phthalocyanine molecule adsorbed on an insulating layer of NaCl on Cu(111) are probed by means of alternate charging scanning tunneling microscopy. Real-space imaging of the electronic transitions reveals the Jahn-Teller distortion occurring upon formation of the first and second anionic charge states. The experimental findings are rationalized by a theoretical many-body model that highlights the crucial role played by the substrate. The latter enhances and stabilizes the intrinsic JahnTeller distortion of the negatively charged molecule hosting a degenerate pair of single-particle frontier orbitals. Consequently, two excess electrons are found to occupy, in the ground state, the same localized orbital, despite a larger Coulomb repulsion than the one for the competing delocalized electronic configuration. Control over the charging sequence by varying the applied bias voltage is also predicted.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCANNING TUNNELING SPECTROSCOPY; CHARGE-STATE; MICROSCOPY; NACL; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni Physics > Institute of Experimental and Applied Physics > Group Jascha Repp |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Jul 2026 09:13 |
| Last Modified: | 21 Jul 2026 09:13 |
| URI: | https://pred.uni-regensburg.de/id/eprint/66353 |
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