Theoretical Aspects of Conducting Polymers: Electronic Structure and Defect States |
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Page 7
... approximation ) . + ns Introducing creation and annihilation operators c and Cns ' respectively , for π - electrons at site n and with spin projection s the effective single - particle Hamiltonian is H = [ f ( r12 ) + - n [ t ( r ) ...
... approximation ) . + ns Introducing creation and annihilation operators c and Cns ' respectively , for π - electrons at site n and with spin projection s the effective single - particle Hamiltonian is H = [ f ( r12 ) + - n [ t ( r ) ...
Page 11
... approximation and the classical treatment of the lattice the variables r correspond to parameters which are determined by minimalizing the total energy . Let ř = ( x1 , x2 ' .... IN denote a given lattice configuration and ( ) > the ...
... approximation and the classical treatment of the lattice the variables r correspond to parameters which are determined by minimalizing the total energy . Let ř = ( x1 , x2 ' .... IN denote a given lattice configuration and ( ) > the ...
Page 26
... approximation ( Inagaki et al . 1975 , Mele and Rice 1980a ) . In particular the stretching mode is split into one involving mostly the C - C bonds and another involving mostly the C = C bonds . This splitting which is actually observed ...
... approximation ( Inagaki et al . 1975 , Mele and Rice 1980a ) . In particular the stretching mode is split into one involving mostly the C - C bonds and another involving mostly the C = C bonds . This splitting which is actually observed ...
Common terms and phrases
A.J. Heeger absorption amplitude approximation associated assume Baeriswyl band becomes Bishop bond alternation bond length bond order boundary calculations Campbell chain changes charge conducting configuration consider constant continuum limit correlation corresponds coupling defect density depend described determined dimerization discrete discuss disorder distortion dynamical effects electronic energy equation et al expected experiments extent field fluctuations force function given gives ground Hamiltonian hand Hückel impurity increasing integral interaction interchain coupling involved kink lattice leads Lett levels limit MacDiarmid Mele modes Notice observed obtained optical parameter particular Peierls phase phonon Phys Physics points polaron polyacetylene polymers potential presented produced properties proposed represents respect Rice Schrieffer self-consistency shown single Solid soliton solution strongly structure temperature theory whereas yields