## Conjugated conducting polymers |

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Page 79

In this limit the exactly half-filled band is described by an isotropic Heisenberg

spin Hamiltonian with exchange ...

consequence of electron-electron interactions is the occurrence of negative spin

...

In this limit the exactly half-filled band is described by an isotropic Heisenberg

spin Hamiltonian with exchange ...

**Spin Densities**. An important observableconsequence of electron-electron interactions is the occurrence of negative spin

...

Page 248

Figure 5.16 exemplifies this point, showing clearly that the SSH alternating

Gaussian or even the rectangular

with ...

Figure 5.16 exemplifies this point, showing clearly that the SSH alternating

**spin****density**(SSH form but with the inclusion of negative**spin densities**on odd sites),Gaussian or even the rectangular

**spin density**distribution give similar resultswith ...

Page 250

Right: Proposed

negative

with half-width / = 1 1 and negative/positive

theoretical ...

Right: Proposed

**spin**-**density**distribution including alternating positive andnegative

**spin**-**density**with half-width / = 1 1 and negative/positive**spin**-**density**with half-width / = 1 1 and negative/positive

**spin**-**density**ratio u/g = 0.43. Thetheoretical ...

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### Contents

Introduction | 1 |

An Overview of the Theory of Conjugated Polymers | 7 |

References | 114 |

Copyright | |

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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