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Quasiparticle Excitations in Polyenes and Polyacetylene
Published online by Cambridge University Press: 25 February 2011
Abstract
We apply the Pariser-Parr-Pople Hamiltonian to study many-electron excitations in polyenes and polyacetylene. The excited singlet states of polyenes, calculated by a multireference double excitation expansion, are classified as quasi-particle excitations, namely as triplet-triplet magnons and particle-hole excitons. From finite polyene spectra we derive approximate dispersion relations for these quasi-particles in the infinite polyene, i.e. polyacetylene.
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- Copyright © Materials Research Society 1988
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