Jahn-Teller effects and surface interactions in multiply-charged fullerene anions and the effect on scanning tunneling microscopy images

Dunn, Janette L., Alqannas, Haifa S. and Lakin, Andrew J. (2015) Jahn-Teller effects and surface interactions in multiply-charged fullerene anions and the effect on scanning tunneling microscopy images. Chemical Physics . ISSN 0301-0104 (In Press)

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Abstract

We investigate the combined effects of Jahn-Teller (JT) coupling and interactions with a surface substrate on fullerene anions C$_{60}^{2-}$ to C$_{60}^{4-}$. JT coupling alone causes the C$_{60}$ ions to instantaneously distort from the icosahedral symmetry of the neutral molecule to a lower symmetry, with the molecule moving dynamically between a set of equivalent distortions. When adsorbed on a surface, the number of equivalent minimum-energy distortions is reduced. The implications of this on observed scanning tunneling microscopy (STM) images will be discussed, and comparisons made with existing experimental data. We show that a consistent interpretation of the images from all of the charge states of C$_{60}$ can only be obtained using a JT model in which the symmetry is further reduced by surface interactions. The comparison with experimental data also allows us to determine relationships between the quadratic Jahn-Teller coupling and surface interaction parameters.

Item Type: Article
RIS ID: https://nottingham-repository.worktribe.com/output/751220
Keywords: Jahn-Teller, Fullerene, Fulleride, STM
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1016/j.chemphys.2015.05.016
Depositing User: Dunn, Dr Janette L
Date Deposited: 15 Jul 2015 12:02
Last Modified: 04 May 2020 17:07
URI: https://eprints.nottingham.ac.uk/id/eprint/29313

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