Conjugated Conducting PolymersHelmut G. Kiess, Dionys Baeriswyl |
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Page 50
... Ground State and Excitation Spectrum Among the many eigenstates of the Hubbard model , the ground state and low- lying excited states are of particular interest . We consider first the non - interacting limit ( U = 0 ) where the ground ...
... Ground State and Excitation Spectrum Among the many eigenstates of the Hubbard model , the ground state and low- lying excited states are of particular interest . We consider first the non - interacting limit ( U = 0 ) where the ground ...
Page 67
... ground state energies , ground state charge and spin densities , and both equal - time ( static ) and imaginary - time ( dynamic ) correlation functions . Converting the imaginary time results to the real time domain to study , for ...
... ground state energies , ground state charge and spin densities , and both equal - time ( static ) and imaginary - time ( dynamic ) correlation functions . Converting the imaginary time results to the real time domain to study , for ...
Page 143
... ground state . In polymers with a non - degenerate ground state , a widely separated kink - antikink pair is energetically unfavourable , because the isomer between the kink and antikink usually has a higher energy than the other . Thus ...
... ground state . In polymers with a non - degenerate ground state , a widely separated kink - antikink pair is energetically unfavourable , because the isomer between the kink and antikink usually has a higher energy than the other . Thus ...
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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