Polaronic optical absorption of the Holstein and Su-Schrieffer-Heeger models
| dc.creator | Capone, M. | |
| dc.creator | Stephan, W. | |
| dc.date | 1996-07-25 | |
| dc.date.accessioned | 2026-07-07T03:08:46Z | |
| dc.date.available | 2026-07-07T03:08:46Z | |
| dc.description | The optical conductivity of a polaronic charge carrier in the intermediate and strong-coupling regimes is calculated for a tight-binding electron using exact diagonalization. Two different simple models of the electron-phonon coupling are considered: the Holstein model, with coupling of the lattice displacement to the local electron density, and the Su-Schrieffer-Heeger type of coupling arising from modulation of the electronic overlap integral. The two models are shown to exhibit a similar polaronic absorption band. However, the Su-Schrieefer-Heeger form of coupling gives rise to a second strong absorption band not present in the Holstein model. This additional feature corresponds to transitions from the ground state of bonding character on a shortened bond to excited states of anti-bonding character on the same shortened bond. | |
| dc.description | 6 pages including 4 postscript figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9607179 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9607179 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/27625 | |
| dc.subject | Condensed Matter | |
| dc.title | Polaronic optical absorption of the Holstein and Su-Schrieffer-Heeger models | |
| dc.type | text |