Abstract
Using a symmetrized density matrix renormalization group formulation, we have investigated the electronic binding energy (Eb) of the lowest optically allowed exciton (1B) and the crossover behavior of the 1B/2A states within an extended Hubbard-Peierls model (with parameters U, V, and δ) for conjugated polymer chains with N=80. The Eb value is found to be around 0.1 eV for polyacetylene and 0.22-0.45 eV for PPV when considering a realistic range of parameters. The 1B/2A crossover behavior is investigated for a wide range of parameters.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1011-1014 |
| Number of pages | 4 |
| Journal | Synthetic Metals |
| Volume | 85 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - Mar 15 1997 |
| Externally published | Yes |
Keywords
- Many-body and quasiparticle theories
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
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