Lattice Dynamics and thermodynamic Responses of XNbSn Half-Heusler Semiconductors: A First-Principles Approach
Keywords:
Density functional theory; Density functional perturbation theory; Half-Heusler semiconductor; Lattice dynamics; Thermodynamic properties; Phonon dispersionsAbstract
In this work, we have evaluated how CoNbSn, IrNbSn, and RhNbSn half Heusler alloys respond to temperature change and the accompanying lattice vibrations as a cubic crystal. There are reports in the literature for CoNbSn with which we compared our result; there are, however, no reports for the other two alloys except for their Debye temperature obtained via machine learning, and our results compare well. Considering that results in the literature for IrNbSn and RhNbSn are scanty, we first computed the alloys' structural and electronic properties to establish their structural stability using the density functional theory and generalised gradient approximation as implemented in the quantum espresso computational suite. We confirmed the equilibrium lattice structure by exploring the three possibilities for a half Heusler alloy and fitting the results to the state's Murnaghan equation. The negative formation energies obtained supports experimental simulation of the alloys. Results from the lattice dynamics and thermodynamic evaluation show that the alloys favour ionic bonding and are ductile. The Debye temperature positions IrNbSn to be the most promising material for thermoelectric application because it has the least Debye temperature; hence it is supposed to have the lowest thermal conductivity. The Dulong-Petit law is obeyed at high temperature as expected. The phonon dispersion and density of states show that the d orbitals of Co and Nb are the significant contributors to the dispersions at both the acoustic and optical modes of the alloys.
Published
How to Cite
Issue
Section
Copyright (c) 2021 Journal of the Nigerian Society of Physical Sciences

This work is licensed under a Creative Commons Attribution 4.0 International License.
How to Cite
Similar Articles
- Namarta Singh, Jatinder saini, Effect of radial non-uniformity on mechanical response of functionally graded discs , Journal of the Nigerian Society of Physical Sciences: Volume 8, Issue 1, February 2026
- Ayomide Hassan Labulo, Elijah Temitope Adesuji, Charles Ojiefoh Oseghale, Elias Emeka Elemike, Adamu Usman, Akinola Kehinde Akinola, Enock Olugbenga Dare, Corrigendum to "Effect of benzophenone on the physicochemical properties of N-CNTs synthesized from 1-ferrocenylmethyl (2-methylimidazole) catalyst" [J. Nig. Soc. Phys. Sci. 2 (2020) 205-217] , Journal of the Nigerian Society of Physical Sciences: Volume 3, Issue 2, May 2021
- Boikanyo Makubate, Marang Pearl Matsuokwane, Lesego Gabaitiri, Broderick O. Oluyede, Simbarashe Chamunorwa, The Type II Topp-Leone-G Power Series Distribution with Applications on Bladder Cancer , Journal of the Nigerian Society of Physical Sciences: Volume 4, Issue 3, August 2022
- Opeyemi O. Enoch, Catherine O. Alakofa , Lukman O. Salaudeen , Odd Order Integrator with Two Complex Functions Control Parameters for Solving Systems of Initial Value Problems , Journal of the Nigerian Society of Physical Sciences: Volume 5, Issue 1, February 2023
- A. Y. Fasasi, E. Ajenifuja, E. Osagie, L. O. Animasaun, A. E. Adeoye, E. I. Obiajunwa, Optical, Dielectric and Optoelectronic Properties of Spray Deposited Cu-doped Fe2O3 Thin Films , Journal of the Nigerian Society of Physical Sciences: Volume 5, Issue 3, August 2023
- Enobong R. Essien, Violette N. Atasie, Ngozi A. Adeleye, Luqman A. Adams, Synthesis and in vitro bioactivity of sodium metasilicate-derived silicon-substituted hydroxyapatite , Journal of the Nigerian Society of Physical Sciences: Volume 6, Issue 3, August 2024
- Oludare Adedire, J. N. Ndam, Mathematical modelling of concentration profiles for species transport through the single and the interconnected multiple-compartment systems , Journal of the Nigerian Society of Physical Sciences: Volume 2, Issue 2, May 2020
- S. A. Adesokan, A. A. Giwa, I. A. Bello, Removal of Trimethoprim from Water using Carbonized Wood Waste as Adsorbents , Journal of the Nigerian Society of Physical Sciences: Volume 3, Issue 4, November 2021
- J. Sunday, G. M. Kumleng, N. M. Kamoh, J. A. Kwanamu, Y. Skwame, O. Sarjiyus, Implicit Four-Point Hybrid Block Integrator for the Simulations of Stiff Models , Journal of the Nigerian Society of Physical Sciences: Volume 4, Issue 2, May 2022
- Olugbenga O. Oluwasina, Abiodun D. Aderibigbe, Damilola C. Petinrin, Adeyemi S. Adebisi, Olayinka O. Oluwasina, Oluwasegun J. Wahab, Potential of Anacardic Acid for Nanosized Cellulose Preparation Under Different Treatment Conditions , Journal of the Nigerian Society of Physical Sciences: Volume 4, Issue 4, November 2022
You may also start an advanced similarity search for this article.

