Theoretical Study of Electronic Structure of Charged Fullerenes

The properties of excited short-living electron quantum levels of positively charged C60+Z fullerenes are numerically investigated with the help of the density functional theory (DFT) packages Quantum Espresso, ORCA, and VASP. Earlier, the existence of the volume-localized electron states for neutra...

Full description

Bibliographic Details
Published in:Journal of Nanomaterials
Main Authors: Alexander Vasiliev, Leonid Matveev, Alexander Mikhaylov, Artem Mitrofanov, Yuri Obukhov, Nikita Orekhov, Alexander Osadchy, Vladimir Stegailov
Format: Article in Journal/Newspaper
Language:English
Published: Hindawi Limited 2021
Subjects:
Online Access:https://doi.org/10.1155/2021/6656716
https://doaj.org/article/4e5fa9528aae4a39b10682ae47fbbd7d
Description
Summary:The properties of excited short-living electron quantum levels of positively charged C60+Z fullerenes are numerically investigated with the help of the density functional theory (DFT) packages Quantum Espresso, ORCA, and VASP. Earlier, the existence of the volume-localized electron states for neutral and charged fullerenes was demonstrated analytically by making use of the model potential approach based on the unique quasispherical geometrical shape of C60. Here, we revisit this issue by verifying numerically the existence of volume-localized states and by calculating physical parameters of all electronic states with a special focus on highly charged fullerene ions. The ionization potentials of C60+Z are calculated and compared with available experimental data. The photoionization cross-sections for neutral fullerene using wave functions are obtained by making use of DFT codes. We demonstrate that lifetimes of excited states vary in the range 10−11÷10−4 s, and for the volume-localized levels, lifetimes are longer than those for the surface-localized states.