Nanotubes in polar media: polarons and excitons on a cylinder
| dc.creator | Gartstein, Yu. N. | |
| dc.creator | Bustamante, T. D. | |
| dc.creator | Castillo, S. Ortega | |
| dc.date | 2006-10-26 | |
| dc.date.accessioned | 2026-07-07T07:27:40Z | |
| dc.date.available | 2026-07-07T07:27:40Z | |
| dc.description | Electrons and holes on semiconducting nanotubes immersed in sluggish polar media can undergo self-localization into polaronic states. We evaluate the binding energy $\bpol$ of adiabatic Fröhlich-Pekar polarons confined to a cylindrical surface and compare it to the corresponding exciton binding energy $\bexc$. The ratio $\bpol/\bexc$ is found to be a non-monotonic function of the cylinder radius $R$ that can reach values of about 0.35, substantially larger than values of about 0.2 for 2$d$ or 3$d$ systems. We argue that these findings represent a more general crossover effect that could manifest itself in other semiconductor nanostructures in 3$d$ polar environments. As a result of the strong polaronic effect, the activation energy of exciton dissociation into polaron pairs is significantly reduced which may lead to enhanced charge separation. | |
| dc.description | Manuscript originally submitted on September 27, 2006 | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0610722 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0610722 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/117459 | |
| dc.subject | Other Condensed Matter | |
| dc.subject | Materials Science | |
| dc.title | Nanotubes in polar media: polarons and excitons on a cylinder | |
| dc.type | text |