## Conjugated Conducting Polymers |

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Page 30

26 ) 11 Y 1 + 1 , Differentiating with

that ε , is stationary with

assuming Viv to be normalized , E141 , v12 = 1 , and differentiating with

to ru + ...

26 ) 11 Y 1 + 1 , Differentiating with

**respect**to y * , and using ( 2 . 25 ) we observethat ε , is stationary with

**respect**to variations in the wavefunctions . Thus ,assuming Viv to be normalized , E141 , v12 = 1 , and differentiating with

**respect**to ru + ...

Page 32

68 ] had found quite generally that a one - dimensional metal is unstable with

Fermi energy and thus leads to a semiconducting , rather than metallic , ground

state .

68 ] had found quite generally that a one - dimensional metal is unstable with

**respect**to a 2kf - modulation of the lattice . This modulation opens a gap at theFermi energy and thus leads to a semiconducting , rather than metallic , ground

state .

Page 51

Furthermore , its derivatives with

information on ground state properties . The derivative with

resonance integral to yields the bond order Po . This in turn is proportional to the

...

Furthermore , its derivatives with

**respect**to to and U provide additional valuableinformation on ground state properties . The derivative with

**respect**to theresonance integral to yields the bond order Po . This in turn is proportional to the

...

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### Contents

Introduction | 1 |

An Overview of the Theory of rConjugated Polymers | 7 |

References | 114 |

Copyright | |

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