Abstract
The structural and electronic properties of heavily doped trans-polyacetylene are studied using a total Hamiltonian consisting three terms: 1) the Su-Schrieffer-Heeger Hamiltonian, 2) an external potential term due to electrostatic interactions between electrons of the polymer chain and counterions and charges on neighboring chains, and 3) a term describing the intra-chain electron-electron interactions. The effects of weak disorder in the positions of the counterions are also studied. At all doping levels included in this study, the ground state configuration is a soliton lattice. The energy gap around the Fermi energy and the density of states at the Fermi energy are calculated. A low bandgap system is obatined in the case of weak disorder at doping levels above 8%. The electronic properties of the polaron lattice are also calculated. Previously reported experimental results and theoretical models for the metallic state of heavily doped trans-polyacetylene are reviewed and discussed in comparison with the results obtained in this study.
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Stafström, S. (1991). Electronic Properties of Heavily Doped Trans-Polyacetylene. In: Brédas, J.L., Silbey, R. (eds) Conjugated Polymers. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3476-7_3
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DOI: https://doi.org/10.1007/978-94-011-3476-7_3
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