## Conjugated conducting polymers |

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Page 48

2.18 and [2.99] ) the two localized electronic levels (at ± eo0) lead to three distinct

intra-gap absorptions, for which analytic expressions are available [2.99] in the

continuum limit: (1) al, a <5-function

...

2.18 and [2.99] ) the two localized electronic levels (at ± eo0) lead to three distinct

intra-gap absorptions, for which analytic expressions are available [2.99] in the

continuum limit: (1) al, a <5-function

**transition**at eo = 2co0, (2) a2, a (strong) low...

Page 95

U on the

hand, if localized states are involved, since the local densities differ in general,

there is a shift in the optical

the ...

U on the

**transition**energy, in agreement with (2.88) and (2.89). On the otherhand, if localized states are involved, since the local densities differ in general,

there is a shift in the optical

**transition**. Consider as an example the**transition**fromthe ...

Page 195

three optical absorption bands can be expected at co, and co3 for the

involving band states, and at co2 for the

gap. Since electron-hole symmetry is implicit in the SSH Hamiltonian, the levels ...

three optical absorption bands can be expected at co, and co3 for the

**transitions**involving band states, and at co2 for the

**transition**between the two levels in thegap. Since electron-hole symmetry is implicit in the SSH Hamiltonian, the levels ...

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### Contents

Introduction | 1 |

An Overview of the Theory of Conjugated Polymers | 7 |

References | 114 |

Copyright | |

5 other sections not shown

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### Common terms and phrases

A.J. Heeger atoms Baeriswyl band band gap behaviour bipolarons bond alternation bond lengths calculations CH)x chain charged solitons Chem chemical shift coefficient conducting polymers configuration conjugated polymers correlation Coulomb interactions coupling Cryst D.K. Campbell decreases defects dependence dimerization discussed dopant dopant concentration doping doping levels e-e interactions effects electron spin electron-electron interactions electron-phonon ENDOR energy excitations exciton experimental Fermi finite polyenes frequency function Hamiltonian Hartree-Fock Heeger Hiickel hopping Hubbard model hyperfine interactions inter-chain kink lattice Lett linewidth magnetic metallic molecular neutral solitons nonlinear nonlinear optical nuclear observed obtained one-dimensional optical absorption optical gap parameter peak Peierls Peierls-Hubbard model phonon Phys polarons polyacetylene polyenes polypyrrole polythiophene properties proton quantum quasi-particles Raman relaxation resonance Sect shown in Fig soliton spectra spectrum spin density SSH model structure symmetry Synth temperature theoretical theory trans trans-(CH)x transition triplet valence bond values Vardeny