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 N2 sites and a Heisenberg spin Hamiltonian with a density - dependent exchange integral J ... Peierls-Hubbard Model.
... Hubbard Hamiltonian decomposes into two mutually independent terms , a tight - binding Hamiltonian for N spinless fermions on N2 sites and a Heisenberg spin Hamiltonian with a density - dependent exchange integral J ... Peierls-Hubbard Model.
Page 59
... Hubbard model is fairly small for weak to intermediate values of U. Hence a value of t 。 in the range 2.5 eV ≤ to ... Peierls - Hubbard Hamiltonian we first notice that the ratio between bond order and bond length , derived in Sect ...
... Hubbard model is fairly small for weak to intermediate values of U. Hence a value of t 。 in the range 2.5 eV ≤ to ... Peierls - Hubbard Hamiltonian we first notice that the ratio between bond order and bond length , derived in Sect ...
Page 123
... Hubbard models : Cyclobutadiene and benzene . J. Chem . Phys . 71 , 3807 ( 1979 ) ; Erratum , ibid . 73 , 598 ( 1980 ) 2.204 S. Mazumdar , S.N. Dixit : Coulomb effects on one - dimensional Peierls instabil- ity : the Peierls - Hubbard model ...
... Hubbard models : Cyclobutadiene and benzene . J. Chem . Phys . 71 , 3807 ( 1979 ) ; Erratum , ibid . 73 , 598 ( 1980 ) 2.204 S. Mazumdar , S.N. Dixit : Coulomb effects on one - dimensional Peierls instabil- ity : the Peierls - Hubbard model ...
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A.J. Heeger atoms Baeriswyl band band gap behaviour bipolarons bond alternation bond lengths calculations chain charge carriers charged solitons Chem chemical shift cis-(CH conducting polymers configuration conjugated polymers Coulomb interaction coupling Cryst D.K. Campbell decreases defects dimerization discussed dopant dopant concentration dopant molecules 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 Kivelson lattice Lett linewidth magnetic metallic molecular neutral solitons nonlinear nonlinear optical nuclear observed 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 Solid State Commun spectra spectrum spin density SSH model susceptibility symmetry Synth theoretical theory thermoelectric coefficient trans trans-(CH trans-polyacetylene transition triplet valence bond values Vardeny