Conjugated Conducting PolymersHelmut G. Kiess, Dionys Baeriswyl |
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Page 103
... Raman - active bond - stretching mode ( cf. ( 2.50 ) ) . It follows that any disorder which induces an inhomogeneous electronic polarizability results in a broadening of Raman lines . The observed spectra are indeed quite broad and ...
... Raman - active bond - stretching mode ( cf. ( 2.50 ) ) . It follows that any disorder which induces an inhomogeneous electronic polarizability results in a broadening of Raman lines . The observed spectra are indeed quite broad and ...
Page 186
... Raman active . In centrosymmetric crystal structures , Raman activity and infrared activity are mutually exclusive for a given lattice vibration . In other crystal structures a phonon can be simultaneously Raman and infrared active . As ...
... Raman active . In centrosymmetric crystal structures , Raman activity and infrared activity are mutually exclusive for a given lattice vibration . In other crystal structures a phonon can be simultaneously Raman and infrared active . As ...
Page 189
... Raman scattering directly probes even parity vibrations of a chain . Due to the electron - phonon coupling , certain Raman lines are resonantly enhanced for photon energies above the band gap . Therefore resonant Raman scattering is ...
... Raman scattering directly probes even parity vibrations of a chain . Due to the electron - phonon coupling , certain Raman lines are resonantly enhanced for photon energies above the band gap . Therefore resonant Raman scattering is ...
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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