Conjugated Conducting PolymersHelmut G. Kiess, Dionys Baeriswyl |
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Page 30
... respect to , and using ( 2.25 ) we observe that ε , is stationary with respect to variations in the wavefunctions . Thus , assuming to be normalized , 11.2 1 , and differentiating with respect to 1 + 1 we obtain = δεν = dt ( r1.1 + 1 ) ...
... respect to , and using ( 2.25 ) we observe that ε , is stationary with respect to variations in the wavefunctions . Thus , assuming to be normalized , 11.2 1 , and differentiating with respect to 1 + 1 we obtain = δεν = dt ( r1.1 + 1 ) ...
Page 32
... respect to a 2k - modulation of the lattice . This modulation opens a gap at the Fermi energy and thus leads to a semiconducting , rather than metallic , ground state . For a half - filled band , a 2k , modulation corresponds to a ...
... respect to a 2k - modulation of the lattice . This modulation opens a gap at the Fermi energy and thus leads to a semiconducting , rather than metallic , ground state . For a half - filled band , a 2k , modulation corresponds to a ...
Page 222
... respect to Bo- For two spins S , and S , a doublet of lines occurs with separation [ 5.14,15 ] Ajk = [ 3S ( S + 1 ) ] / 22hr [ 3 cos29jk - 1 ] jk jk ( 5.1.16 ) that depends upon the separation r and the angle 9 of the interspin - vector ...
... respect to Bo- For two spins S , and S , a doublet of lines occurs with separation [ 5.14,15 ] Ajk = [ 3S ( S + 1 ) ] / 22hr [ 3 cos29jk - 1 ] jk jk ( 5.1.16 ) that depends upon the separation r and the angle 9 of the interspin - vector ...
Contents
Introduction | 1 |
An Overview of the Theory of лConjugated Polymers | 7 |
7 | 65 |
Copyright | |
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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 cis-(CH conducting polymers configuration conjugated polymers Coulomb interactions coupling Cryst D.K. Campbell defects dependence dimerization discussed dopant doping doping levels e-e interactions electron correlation electron spin electron-electron interactions electron-phonon ENDOR energy excitations exciton experimental finite polyenes frequency function Hamiltonian Hartree-Fock hopping Hubbard model Hückel inter-chain kink lattice Lett linewidth magnetic Metals molecular molecules neutral solitons nonlinear nonlinear optical nuclear observed obtained one-dimensional optical absorption optical gap 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 Solid State Commun spectra spectrum spin density SSH model structure susceptibility symmetry Synth temperature theoretical theory trans trans-(CH trans-polyacetylene transition triplet valence bond values Vardeny