Abstract
The evolution of the Pauli susceptibility versus the doping concentration for the highly doped trans-polyacetylene chains is studied. The analysis is focused on the inter-chain interactions that have been added to the Su-Shrieffer-Haeger (SSH) Hamiltonian. The calculations are restricted to the finite (100–500 sites) chains of the polyacetylene. It is shown that the additional coupling corrects a character of the insulator-metal phase transition observed in trans-polyacetylene.
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