Collective excitations and optical absorption in polyene chains
- 14 March 1979
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 12 (5), 819-836
- https://doi.org/10.1088/0022-3719/12/5/012
Abstract
The simple model of a polyene chain, presented in a previous paper (Chem. Phys. Lett., vol.53, p.45, 1978), is modified to include longer-range forces. A new state, the spin-polarised state, is found to be the ground state. Based on this ground state, the various collective excitations are investigated by calculating the response function. States corresponding to both singlet and triplet excitons are found as well as the continuum and more exotic states. The optical absorption due to these states is investigated and a typical exciton wavefunction is calculated.Keywords
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