What can single-molecule Fano resonance tell?
- 28 January 2021
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 154 (4), 044309
- https://doi.org/10.1063/5.0033200
Abstract
In this work, we showcase applications of single-molecule Fano resonance (SMFR) measurements beyond the determination of molecular excitonic energy and associated dipole orientation. We use the SMFR measurement to probe the local influence of a man-made single chlorine vacancy on the molecular transition of a single zinc phthalocyanine, which clearly reveals the lifting-up of the double degeneracy of the excited states due to defect-induced configurational changes. Furthermore, time-trace SMFR measurements at different excitation voltages are used to track the tautomerization process in a free-base phthalocyanine. Different behaviors in switching between two inner-hydrogen configurations are observed with decreasing voltages, which helps to reveal the underlying tautomerization mechanism involving both the molecular electronic excited states and vibrational excited states in the ground state.Funding Information
- National Key Research and Development Program of China (2016YFA0200600, 2017YFA0303500)
- Strategic Priority Research Program of Chinese Academy of Sciences (XDB36000000)
- Anhui Initiative in Quantum Information Technologies
- National Natural Science Foundation of China
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