Abstract
The electronic structure of (8,0) gold nanotubes have been studied using quantum field theory methods in the framework of the Hubbard model. An expression for the Fourier transform of the anticommutator Green function, the poles of which determine the energy spectrum of the system under consideration, has been derived. The energy spectrum demonstrates that the (8,0) gold nanotube has metal-like electronic structure. The peaks of the calculated density of states correspond to Van Hove singularities. The optical absorption spectrum is presented, and the energy of the first direct optical transition is 0.55 eV.
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