First-principles study of electronic structures, thermodynamic, and thermoelectric properties of the new Rattling Full Heusler compounds Ba2AgZ (Z = As, Sb, Bi) - Université de Lille Accéder directement au contenu
Article Dans Une Revue Revista Mexicana de Fisica Année : 2021

First-principles study of electronic structures, thermodynamic, and thermoelectric properties of the new Rattling Full Heusler compounds Ba2AgZ (Z = As, Sb, Bi)

Kalaliz Kheira
  • Fonction : Auteur
A. Chahed
  • Fonction : Auteur
M. A. Boukli
  • Fonction : Auteur
M. A. Khettir
  • Fonction : Auteur

Résumé

The ab initio calculations based on the density functional theory (DFT) using the self-consistent Full potential linearized augmented plane wave (FPLAPW) method were performed to explore the electronic structures, thermodynamic and thermoelectric properties of new rattling Full Heusler alloys Ba2AgZ (Z = As, Sb, Bi). Results showed that the AlCu2Mn-type structure state is energetically the most stable structure. The results show that the electronic property of these cubic Rattling Heusler alloys have a semiconducting behavior with indirect band gaps Eg (L-D). The predicted band gaps were found to be 0.566, 0.548 and 0.433 eV for Z = As, Sb and Bi, respectively. The thermodynamic properties comprising the thermal expansion coefficient, heat capacity, entropy and Debye temperature parameter were evaluated at various pressures from 0 to 15 GPa. Thermoelectric properties of the Ba2AgZ (Z= As, Sb, Bi) materials are additionally computed over an extensive variety of temperature and it is discovered that all compounds exhibit ultralow thermal conductivity, good Seebeck coefficients and large high power factors, thus resulting they are suitable for use in thermoelectric device applications.
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Dates et versions

hal-04547773 , version 1 (16-04-2024)

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Kalaliz Kheira, A. Chahed, M. A. Boukli, M. A. Khettir, A. Oughilas, et al.. First-principles study of electronic structures, thermodynamic, and thermoelectric properties of the new Rattling Full Heusler compounds Ba2AgZ (Z = As, Sb, Bi). Revista Mexicana de Fisica, 2021, Revista Mexicana de Fisica, 67 (6 Nov-Dec), ⟨10.31349/RevMexFis.67.060501⟩. ⟨hal-04547773⟩
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