Bipolaron-impurity complexes in quasi-1D semiconductors
Kirova N. N.
The interaction of bipolarons and Coulomb impurities in quasi-ID materials is analyzed. The bound state of a bipolaron at an impurity is asymmetric and degenerate in terms of the direction of the dipole moment. This circumstance gives rise to a low-frequency absorption and to a linear temperature dependence of the specific heat, c(T). The results agree qualitatively with experimental data on doped polyacetylene.