Exciton effects in soliton and bipolaron lattice states of doped electron-phonon Peierls systems

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dc.creatorHarigaya, Kikuo
dc.creatorShimoi, Yukihiro
dc.creatorAbe, Shuji
dc.date1994-11-05
dc.date.accessioned2026-07-07T03:07:31Z
dc.date.available2026-07-07T03:07:31Z
dc.descriptionExciton effects on soliton and bipolaron lattice states are investigated using an electron-lattice Peierls model with long-range Coulomb interactions. The Hartree-Fock (HF) approximation and the single-excitation configuration- interaction (single-CI) method are used to obtain optical absorption spectra. We discuss the following properties: (1) The attraction between the excited electron and the remaining hole makes the excitation energy smaller when the correlations are taken into account by the single-CI. The oscillator strengths of the lower excited states become relatively larger than in the HF calculations. (2) We look at variations of relative oscillator strengths of two or three kinds of excitons described by the single-CI. While the excess-electron concentration is small, the ratio of the oscillator strengths of the exciton with the lowest energy increases almost linearly. The oscillator strengths accumulate at this exciton as the concentration increases.
dc.descriptionPrinted figures should be requested from the author K.Harigaya (harigaya@etl.go.jp)
dc.identifierhttps://arxiv.org/abs/cond-mat/9411027
dc.identifierhttp://arxiv.org/abs/cond-mat/9411027
dc.identifierJ. Phys.: Condens. Matter 7 (1995) 4061-4073
dc.identifierdoi:10.1088/0953-8984/7/21/006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/27198
dc.subjectCondensed Matter
dc.subjectChemical Physics
dc.subjectMaterials Science
dc.titleExciton effects in soliton and bipolaron lattice states of doped electron-phonon Peierls systems
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