Conjugated Conducting PolymersHelmut G. Kiess, Dionys Baeriswyl |
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Page 9
... involving heteroatoms ( polythiophene and polypyrrole , Figs . 2.3a and 2.3b ) and those involving aromatic units ( poly- ( para ) -phenylene , Fig . 2.4a and poly- ( para ) - phenylene vinylene , Fig . 2.4b ) to polymers involving both ...
... involving heteroatoms ( polythiophene and polypyrrole , Figs . 2.3a and 2.3b ) and those involving aromatic units ( poly- ( para ) -phenylene , Fig . 2.4a and poly- ( para ) - phenylene vinylene , Fig . 2.4b ) to polymers involving both ...
Page 21
... involve two distinct sites , three - centre integrals if they involve three distinct sites , and so on . Below we will discuss various approximations which neglect the multi- centre integrals , i.e. those involving more than two ...
... involve two distinct sites , three - centre integrals if they involve three distinct sites , and so on . Below we will discuss various approximations which neglect the multi- centre integrals , i.e. those involving more than two ...
Page 195
... involving band states , and at w2 for the transition between the two levels in the gap . Since electron - hole symmetry is implicit in the SSH Hamiltonian , the levels are , as already mentioned , located symmetrically with respect to ...
... involving band states , and at w2 for the transition between the two levels in the gap . Since electron - hole symmetry is implicit in the SSH Hamiltonian , the levels are , as already mentioned , located symmetrically with respect to ...
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A.J. Heeger atoms Baeriswyl band band gap behaviour bipolarons bond alternation bond lengths calculations chain charged solitons Chem chemical shift coefficient conducting polymers configuration conjugated polymers correlation Coulomb interactions coupling Cryst D.K. Campbell defects dependence dimerization discussed dopant doping doping levels e-e interactions effects electron spin electron-electron interactions electron-phonon ENDOR energy excitations exciton experimental Fermi finite polyenes frequency function ground Hamiltonian Hartree-Fock hopping Hubbard model Hückel independent-electron inter-chain kink lattice Lett linewidth magnetic metallic molecular neutral solitons nonlinear nonlinear optical nuclear observed obtained one-dimensional optical absorption optical gap pair 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 susceptibility symmetry Synth temperature theoretical theory trans trans-(CH trans-polyacetylene transition V₁ valence bond values Vardeny