## Conjugated Conducting Polymers |

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Page 84

In the limit of stronge e - e

valence bond diagrams with no double occupancies but ( since the band is half

filled ) all sites singly occupied . Since the current operator mediating the optical ...

In the limit of stronge e - e

**coupling**, the ground state consists of purely covalentvalence bond diagrams with no double occupancies but ( since the band is half

filled ) all sites singly occupied . Since the current operator mediating the optical ...

Page 96

Thus as the strength of the electron - electron interaction parameter U increases ,

this difference in transition energies crosses over from the weak

lK ) to the strong

...

Thus as the strength of the electron - electron interaction parameter U increases ,

this difference in transition energies crosses over from the weak

**coupling**( ~ U /lK ) to the strong

**coupling**~ U behaviour . With both U and V , present the soliton...

Page 107

On the other hand , for polymers in the solid state even a weak inter - chain

which is not much smaller than the mean - field expression T . = 0 . 56740 / kb

5000 K ...

On the other hand , for polymers in the solid state even a weak inter - chain

**coupling**is sufficient to sustain the long - range order up to a critical temperaturewhich is not much smaller than the mean - field expression T . = 0 . 56740 / kb

5000 K ...

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### Contents

Introduction | 1 |

An Overview of the Theory of rConjugated Polymers | 7 |

References | 114 |

Copyright | |

6 other sections not shown

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### Common terms and phrases

absorption addition applied approach approximation atoms band behaviour bipolarons bond bond alternation calculations carriers chain charged chemical concentration conductivity configuration conjugated polymers contribution correlation corresponding Coulomb Coulomb interactions coupling decreases defects density dependence described determined dimerization discussed dopant doping effects electron electron-electron energy excitations expected experimental experiments field finite frequency function give ground Hamiltonian hopping Hubbard important increase indicated interactions interpretation involving lattice leads length Lett limit localized magnetic materials measurements metallic methods modes molecules motion neutral nuclear observed obtained optical pair parameter peak phonon Phys Physics polarons polyacetylene polyenes polymers position properties range relaxation resonance respect samples Sect separation shift shown shows similar single soliton spectra spectrum spin structure studies symmetry Synth temperature theoretical theory trans-(CH transition units valence values whereas