Response properties of AgCl and AgBr under an external static electric field: A density functional study

Abstract : Density functional theory has been applied to investigate the effect of electric field on the electronic properties of AgCl and AgBr crystals using a static electric field perturbation. A reduction in the band gap value and widening of the band widths are observed with increase in the macroscopic field value indicating a considerable red shift in the absorption spectrum of AgCl and AgBr in the presence of an external electric field. Further, dielectric properties and lattice vibrations at the gamma point are calculated with three different functionals using the CPKS and the Berry phase approach as implemented in CRYSTAL09 code. Finally, the breakdown strength of AgCl and AgBr crystal is evaluated using Callen's equation. In contrast to the case of alkali halides, it is found that the inclusion of the numerically calculated effective mass ratio into the Callen's equation considerably improves the agreement between the calculated dielectric strength and the available experimental datum. © 2012 Elsevier Masson SAS. All rights reserved.
Type de document :
Article dans une revue
Solid State Sciences, 2012, 14 (10), pp.1412-1418. 〈10.1016/j.solidstatesciences.2012.08.002〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01610574
Contributeur : Sylvie Blanc <>
Soumis le : mercredi 4 octobre 2017 - 19:06:44
Dernière modification le : jeudi 11 janvier 2018 - 06:28:13

Identifiants

Collections

Citation

C.S. Praveen, A. Kokalj, Michel Rérat, M. Valant. Response properties of AgCl and AgBr under an external static electric field: A density functional study. Solid State Sciences, 2012, 14 (10), pp.1412-1418. 〈10.1016/j.solidstatesciences.2012.08.002〉. 〈hal-01610574〉

Partager

Métriques

Consultations de la notice

67