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| HAL : hal-00471637, version 1 |
| DOI : 10.1063/1.3368126 |
| Fiche détaillée |  Récupérer au format |
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| Applied Physics Letters 96, (2010) 123106 |
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| Excitonic effects in the optical properties of CdSe nanowires |
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| José G. Vilhena 1Silvana Botti 1, 2 |
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| (23/03/2010) |
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| Using a first-principle approach beyond density functional theory we calculate the electronic and optical properties of small diameter CdSe nanowires. Our results demonstrate how some approximations commonly used in bulk systems fail at this nanoscale level and how indispensable it is to include crystal local fields and excitonic effects to predict the unique optical properties of nanowires. From our results, we then construct a simple model to describe the optical gap as a function of the diameter of the wire, that turns out to be in excellent agreement with experiments for intermediate and large diameters. |
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| 1 : | Laboratoire de Physique de la Matière Condensée et Nanostructures (LPMCN) |
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CNRS : UMR5586 – Université Claude Bernard - Lyon I |
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| 2 : | Laboratoire des Solides Irradiés (LSI) |
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CNRS : UMR7642 – CEA : DSM/DRECAM – Polytechnique - X |
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| Domaine | : | Physique/Matière Condensée/Science des matériaux |
| hal-00471637, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00471637 | |
| oai:hal.archives-ouvertes.fr:hal-00471637 | |
| Contributeur : Silvana Botti | |
| Soumis le : Jeudi 8 Avril 2010, 16:24:08 | |
| Dernière modification le : Jeudi 8 Avril 2010, 16:31:23 | |
