Structural, Elastic and Thermodynamic Properties of ScP Compound: DFT Study

Authors A. Benamrani1, S. Daoud2, P.K. Saini3
Affiliations

1Département des Sciences et Techniques, Faculté des Sciences et de la Technologie, Université Mohamed Elbachir El Ibrahimi de Bordj Bou Arreridj, Bordj Bou Arreridj, 34000, Algérie

2Laboratoire Matériaux et Systèmes Electroniques, Faculté des Sciences et de la Technologie, Université Mohamed Elbachir El Ibrahimi de Bordj Bou Arreridj, Bordj Bou Arreridj, 34000, Algérie

3Department of Physics, Government College, Hansi, Haryana, 125033, India

Е-mail [email protected], [email protected], [email protected]
Issue Volume 13, Year 2021, Number 1
Dates Received 17 January 2021; revised manuscript received 23 February 2021; published online 25 February 2021
Citation A. Benamrani, S. Daoud, P.K. Saini, J. Nano- Electron. Phys. 13 No 1, 01008 (2021)
DOI https://doi.org/10.21272/jnep.13(1).01008
PACS Number(s) 62.20.de, 62.30. + d, 64.70.kd, 65.40. + g
Keywords ScP material, Phase transition (6) , Elastic constant (5) , Hardness (12) , Thermodynamic properties (3) .
Annotation

The present work aims to investigate the structural parameters, elastic constants and thermodynamic properties of scandium mono-phosphide (ScP) binary compound. We employed the Quantum Espresso code with the projected augmented wave (PAW) pseudopotentials approach in the framework of the density functional theory (DFT). Firstly, we report the ground state parameters of both NaCl-type (B1) and CsCl-type (B2) phases. Generally, our obtained data agree well with other results of the literature. Our calculated value (5.205 Å) of a0 for B1 phase deviates from the experimental result (5.312 Å) by around 2 %.

The structural phase transition from B1 to B2 phase under pressure was determined. Our calculation shows that ScP transforms from B1 to B2 phase at a pressure of 108 GPa, with a volume collapse of 4.3 %.

Secondly, we calculate the elastic stiffness constants, elastic moduli, anisotropy factor, Poisson's ratio, Vickers hardness, fracture toughness, acoustic wave speeds, Debye temperature and melting point of the most stable phase (B1). Our data of the elastic constants are also in good agreement with other theoretical results of the literature. The Vickers hardness HV of ScP compound was found equal to 12.7 GPa, while the Debye temperature θD was found at around 551.8 (522.1) K. Moreover, some interesting thermodynamic properties, especially the energy, free energy, entropy and constant volume heat capacity as a function of temperature were also reported and discussed.

List of References