Abstract—Anticommutator Green’s functions and energy spectra of fullerene C20 with the Ih, D5d, and D3d symmetry groups have been obtained in an analytical form within the Hubbard model and static fluctuation approximation. The energy states have been classified using the methods of group theory, and the allowed transitions in the energy spectra of fullerene C20 with the Ih, D5d, and D3d symmetry groups have been determined. It is also shown how the energy levels of fullerene C20 with the Ih symmetry group are split with the symmetry reduction.
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Silant’ev, A.V. Influence of Deformation on the Energy and Optical Absorption Spectra of Fullerene C20 within the Hubbard Model. Phys. Solid State 61, 263–273 (2019). https://doi.org/10.1134/S1063783419020288
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DOI: https://doi.org/10.1134/S1063783419020288