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
- Pragati, Rajneesh Kumar, Sachin Kaushal, Effect of a moving thermal load in a modified couple stress medium with double porosity and hyperbolic two-temperature theory , Journal of the Nigerian Society of Physical Sciences: Volume 8, Issue 1, February 2026
- Rafiu Adewale Busari, Ezekiel Omotoso, Lukman O. Animasahun, Saheed Adekunle Adewinbi, Emmanuel O. Adewumi, Comfort T. Famoroti, Bidini A. Taleatu, Adeniyi Y. Fasasi, Tuning the optical properties and some surface structure of Cd-O thin film electrodeposited by two-electrode: An effect of Cobalt incorporation , Journal of the Nigerian Society of Physical Sciences: Volume 5, Issue 2, May 2023
- Lamees K. Alzaki, Hassan Kamil Jassim, Time-Fractional Differential Equations with an Approximate Solution , Journal of the Nigerian Society of Physical Sciences: Volume 4, Issue 3, August 2022
- Fathelrhman EL Guma, Ossama M. Badawy, Mohammed Berir, Mohamed A. Abdoon, Numerical Analysis of Fractional-Order Dynamic Dengue Disease Epidemic in Sudan , Journal of the Nigerian Society of Physical Sciences: Volume 5, Issue 2, May 2023
- Sunday Olorunfunmi, Armand Bahini, Adenike Olatinwo, Theoretical Study on 10C Elastic Scattering Cross Sections Using Different Cluster Density Distributions and Different Potentials , Journal of the Nigerian Society of Physical Sciences: Volume 5, Issue 2, May 2023
- E. P. Inyang, E. O. Obisung, P. C. Iwuji, J. E. Ntibi, J. Amajama, E. S. William, Masses and thermal properties of a Charmonium and Bottomonium Mesons , Journal of the Nigerian Society of Physical Sciences: Volume 4, Issue 3, August 2022
- A. M. Olaosun, C. A. Aborisade, D. E. Shian, P. T. Osuolale, Comprehensive study of photon and proton interactions to interpret the radiation parameters of boron derivative drugs for chemoradiotherapy , Journal of the Nigerian Society of Physical Sciences: Volume 7, Issue 2, May 2025
- Tertsea Igbawua, Aondongu Alexander Tyovenda, Terver Sombo, Idugba Mathias Echi, Spatio-temporal assessment of aerosol-induced atmospheric heating rates in Nigeria , Journal of the Nigerian Society of Physical Sciences: Volume 7, Issue 2, May 2025
- Sylvester J. Gemanam, Nursakinah Suardi, Barnabas A. Ikyo, Samson Damilola Oluwafemi, Terver Daniel, Samuel T. Kungur, Biostimulation Effects and Temperature Variation in Stimulated Dielectric Substance (Diabetic Blood Comparable to Non-Diabetic Blood) Based on the Specific Absorption Rate (SAR) in Laser Therapy , Journal of the Nigerian Society of Physical Sciences: Volume 3, Issue 2, May 2021
- Idris Babaji Muhammad, Salisu Usaini, Dynamics of Toxoplasmosis Disease in Cats population with vaccination , Journal of the Nigerian Society of Physical Sciences: Volume 3, Issue 1, February 2021
You may also start an advanced similarity search for this article.

