| Title: |
Effects of strontium concentration on structural, electronic, optical and thermodynamic properties of Pb 1‐x Sr x S |
| Authors: |
Zeroual, Jazia; Labidi, Salima; Labidi, Malika; Bensalem, Rachid |
| Source: |
physica status solidi c ; volume 13, issue 7-9, page 623-628 ; ISSN 1862-6351 1610-1642 |
| Publisher Information: |
Wiley |
| Publication Year: |
2016 |
| Collection: |
Wiley Online Library (Open Access Articles via Crossref) |
| Description: |
Theoretical investigations of structural, electronic, optical and thermodynamic properties of Pb 1‐x Sr x S with rocksalt crystal structure are reported, theoretical calculations are mainly based on the full potential linearized augmented plane wave (FP‐LAPW) method within the density functional theory (DFT) the generalized gradient approximation (GGA) of Perdew et al. The dependence of the lattice parameters, band gaps, dielectric constants, refractive indices, and mixing entropies on the composition x were analyzed mainly for x = 0, 0.25, 0.50, 0.75 and 1. The lattice constant for Pb 1‐x Sr x S exhibits a marginal deviation from the Vegard’s law. A significant deviation of the bulk modulus from linear concentration dependence was observed for the alloy. The microscopic origins of the gap bowing were detailed and explained. The composition dependence of the dielectric constant and refractive index was studied using different models. Besides, a regular‐solution model is used to investigate the thermodynamic stability of the alloys, which mainly indicates a phase miscibility gap. In fact and since there is a good agreement between our main results and the available experimental data for the binary compounds which may be a support for the results of the ternary alloys reported here for the first time. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1002/pssc.201510237 |
| Availability: |
http://dx.doi.org/10.1002/pssc.201510237; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fpssc.201510237; https://onlinelibrary.wiley.com/doi/pdf/10.1002/pssc.201510237 |
| Rights: |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
| Accession Number: |
edsbas.C5FD82D0 |
| Database: |
BASE |