Conjugated Conducting PolymersHelmut G. Kiess, Dionys Baeriswyl |
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Page 56
... Hubbard Hamiltonian decomposes into two mutually independent terms , a tight - binding Hamiltonian for N spinless fermions on N , sites and a Heisenberg spin Hamiltonian with a density - dependent exchange integral J [ 2.148 , 149 ] ...
... Hubbard Hamiltonian decomposes into two mutually independent terms , a tight - binding Hamiltonian for N spinless fermions on N , sites and a Heisenberg spin Hamiltonian with a density - dependent exchange integral J [ 2.148 , 149 ] ...
Page 119
... Hubbard model for arbitrary electron density and large U. Phys . Rev. B 37 , 7541-7548 ( 1988 ) 2.123 A.A. Ovchinnikov : Excitation spectrum in the one - dimensional Hubbard model . Zh . Eksp . Teor . Fiz . 57 , 2137-2143 ( 1969 ) [ Sov ...
... Hubbard model for arbitrary electron density and large U. Phys . Rev. B 37 , 7541-7548 ( 1988 ) 2.123 A.A. Ovchinnikov : Excitation spectrum in the one - dimensional Hubbard model . Zh . Eksp . Teor . Fiz . 57 , 2137-2143 ( 1969 ) [ Sov ...
Page 120
... Hubbard model . Phys . Rev. B 8 , 2236-2247 ( 1973 ) 2.137 L. Hulthen : Über das Austauschproblem eines Kristalls . Arkiv Mat . Astron . Fysik 26A , A ( 1938 ) 2.138 M. Takahashi : Magnetization curve for the half - filled Hubbard model ...
... Hubbard model . Phys . Rev. B 8 , 2236-2247 ( 1973 ) 2.137 L. Hulthen : Über das Austauschproblem eines Kristalls . Arkiv Mat . Astron . Fysik 26A , A ( 1938 ) 2.138 M. Takahashi : Magnetization curve for the half - filled Hubbard model ...
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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 coefficient conducting polymers configuration conjugated polymers correlation Coulomb interactions coupling Cryst D.K. Campbell defects dependence dimerization discussed dopant doping doping levels e-e interactions effects electron spin electron-electron interactions electron-phonon ENDOR energy excitations exciton experimental Fermi finite polyenes frequency function ground Hamiltonian Hartree-Fock hopping Hubbard model Hückel independent-electron inter-chain kink lattice Lett linewidth magnetic metallic molecular neutral solitons nonlinear nonlinear optical nuclear observed obtained one-dimensional optical absorption optical gap pair 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 soliton spectra spectrum spin density SSH model structure susceptibility symmetry Synth temperature theoretical theory trans trans-(CH trans-polyacetylene transition V₁ valence bond values Vardeny