Conjugated Conducting PolymersHelmut G. Kiess, Dionys Baeriswyl |
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Page 136
... atom . The bands form by a splitting of the atomic levels when the atoms approach one another and obtain their equilibrium positions in the crystal . The bands are separated by forbidden energy ranges called gaps . The gap relevant for ...
... atom . The bands form by a splitting of the atomic levels when the atoms approach one another and obtain their equilibrium positions in the crystal . The bands are separated by forbidden energy ranges called gaps . The gap relevant for ...
Page 139
... atom and its two nearest neighbours are equal , due to the symmetry of the atomic structure . In cis- ( CH ) ,, however , the hydrogen atoms take different positions at two adjacent carbon atoms ; as a consequence the transfer integrals ...
... atom and its two nearest neighbours are equal , due to the symmetry of the atomic structure . In cis- ( CH ) ,, however , the hydrogen atoms take different positions at two adjacent carbon atoms ; as a consequence the transfer integrals ...
Page 147
... atoms [ 3.24 ] . The length of fully conjugated chain segments is , however , considerably smaller . In trans - polyacetylene , grown by the Shirakawa method , lengths of about 50-100 carbon atoms were observed [ 3.25 , 26 ] . This ...
... atoms [ 3.24 ] . The length of fully conjugated chain segments is , however , considerably smaller . In trans - polyacetylene , grown by the Shirakawa method , lengths of about 50-100 carbon atoms were observed [ 3.25 , 26 ] . This ...
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A.J. Heeger atoms Baeriswyl band gap behaviour bipolarons bond alternation bond lengths calculations chain charge carriers charged solitons Chem chemical shift cis-(CH conducting polymers conjugated polymers correlation Coulomb interaction coupling Cryst D.K. Campbell defects dielectric function diffusion dimerization discussed dopant dopant concentration dopant molecules doping doping levels e-e interactions effects electron correlation electron spin electron-electron interactions electron-phonon ENDOR energy excitations exciton experimental frequency function Hamiltonian Hartree-Fock hopping Hubbard model Hückel hyperfine interactions inter-chain Kivelson lattice Lett linewidth magnetic metallic molecular neutral solitons nonlinear nonlinear optical nuclear observed obtained one-dimensional optical absorption optical gap parameters peak Peierls Peierls-Hubbard model phonon Phys polarons polyacetylene polyenes polypyrrole polythiophene properties proton quantum quasi-particles Raman resonance samples Sect shown in Fig spectra spectrum spin density structure symmetry Synth tensor theory trans trans-(CH trans-polyacetylene transition valence values Vardeny