Theoretical investigation of the structural, elastic, electronic, and optical properties of the ternary tetragonal tellurides KBTe2 (B = Al, In)
| Autor: | A. Bouhemadou, S. Maabed, Yarub Al-Douri, A. Bentabet, M. Sidoumou, M. Bouchenafa, Mohamed Halit, A. Benmakhlouf, S. Bin-Omran, Rabah Khenata |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Infrared Mechanical Engineering Charge density 02 engineering and technology Electronic structure 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Molecular physics Condensed Matter::Materials Science Tetragonal crystal system Mechanics of Materials Ab initio quantum chemistry methods 0103 physical sciences General Materials Science 0210 nano-technology Anisotropy Ternary operation Refractive index |
| Zdroj: | Materials Science in Semiconductor Processing. 114:105085 |
| ISSN: | 1369-8001 |
| DOI: | 10.1016/j.mssp.2020.105085 |
| Popis: | Structural parameters, elastic constants, electronic structure and optical functions of the ternary tetragonal chalcogenides KAlTe2 and KInTe2 are predicted via ab initio calculations. The calculated structural parameters and interatomic distances agree very well with the existing experimental results. The computed band structures show that the two studied materials are semiconductors with indirect band-gaps. The computed partial density of states diagrams, charges transfer and distribution of charge density show that the interatomic bonds are mainly of a covalent nature. The calculated elastic constants indicate that the title compounds are mechanically stable and elastically strongly anisotropic. The calculated optical spectra for both explored compounds exhibit a significant optical anisotropy. Both compounds have a low absorption in the visible range compared to the infrared (IR) domain. The refractive index spectrum of KInTe2 is more anisotropic than that of KAlTe2. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect