## Conjugated conducting polymers |

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Page 57

In particular, we shall add firstly an extrinsic

in Sect. 2.3 [2.82] to permit us to describe systems with non-degenerate ground

states (e.g. cis-(CH)x, polythiophene, polyparaphenylene-vinylene, polypyrrole, ...

In particular, we shall add firstly an extrinsic

**dimerization**term already discussedin Sect. 2.3 [2.82] to permit us to describe systems with non-degenerate ground

states (e.g. cis-(CH)x, polythiophene, polyparaphenylene-vinylene, polypyrrole, ...

Page 71

Hubbard model, it is necessary to go to second order in U to see the

enhancement of

2.167]. A real space renormalization group approach [2.185] combines both

analytical and ...

Hubbard model, it is necessary to go to second order in U to see the

enhancement of

**dimerization**, since there is no effect of U alone in first order [2.167]. A real space renormalization group approach [2.185] combines both

analytical and ...

Page 109

A simple estimate of the zero-point motion of the atoms about their classical

equilibrium positions shows that these excursions are of roughly the same order

as the classical

whether ...

A simple estimate of the zero-point motion of the atoms about their classical

equilibrium positions shows that these excursions are of roughly the same order

as the classical

**dimerization**amplitude [2.1 1, 393]. One may thus wonderwhether ...

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### Contents

Introduction | 1 |

An Overview of the Theory of Conjugated Polymers | 7 |

References | 114 |

Copyright | |

7 other sections not shown

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### Common terms and phrases

A.J. Heeger AsF5 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 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-(CH)x transition triplet valence bond values Vardeny