Conjugated Conducting PolymersHelmut G. Kiess, Dionys Baeriswyl |
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Page 88
... coupling , the exciton being the neutral counterpart of the ( charged ) bipolarons discussed in Sect . 1.3 . In the absence of inter - chain coupling , the singlet exciton formed in this manner would presumably be short - lived ; as ...
... coupling , the exciton being the neutral counterpart of the ( charged ) bipolarons discussed in Sect . 1.3 . In the absence of inter - chain coupling , the singlet exciton formed in this manner would presumably be short - lived ; as ...
Page 96
... coupling ( ~ U / l ) to the strong coupling ~ U behaviour . With both U and V1 present the soliton - induced absorptions in the strongly correlated limit are still at zero energy and at the band edge ~ U - V1 . Interestingly , the ...
... coupling ( ~ U / l ) to the strong coupling ~ U behaviour . With both U and V1 present the soliton - induced absorptions in the strongly correlated limit are still at zero energy and at the band edge ~ U - V1 . Interestingly , the ...
Page 107
... coupling is sufficient to sustain the long - range order up to a critical temperature which is not much smaller than the mean - field expression T , = 0.56740 / kg ≈ 5000 K. One obvious question concerns the nature of this inter ...
... coupling is sufficient to sustain the long - range order up to a critical temperature which is not much smaller than the mean - field expression T , = 0.56740 / kg ≈ 5000 K. One obvious question concerns the nature of this inter ...
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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