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First-principles calculations to investigate influence of transition metals TM (TM = Ti, Zr, Hf) on elastic properties and thermodynamic properties of ScB12 and YB12 dodecaborides. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139680] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Naher MI, Naqib SH. An ab-initio study on structural, elastic, electronic, bonding, thermal, and optical properties of topological Weyl semimetal TaX (X = P, As). Sci Rep 2021; 11:5592. [PMID: 33692423 PMCID: PMC7970924 DOI: 10.1038/s41598-021-85074-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 02/25/2021] [Indexed: 12/04/2022] Open
Abstract
In recent days, study of topological Weyl semimetals have become an active branch of physics and materials science because they led to realization of the Weyl fermions and exhibited protected Fermi arc surface states. Therefore, topological Weyl semimetals TaX (X = P, As) are important electronic systems to investigate both from the point of view of fundamental physics and potential applications. In this work, we have studied the structural, elastic, mechanical, electronic, bonding, acoustic, thermal and optical properties of TaX (X = P, As) in detail via first-principles method using the density functional theory. A comprehensive study of elastic constants and moduli shows that both TaP and TaAs possesses low to medium level of elastic anisotropy (depending on the measure), reasonably good machinability, mixed bonding characteristics with ionic and covalent contributions, brittle nature and relatively high Vickers hardness with a low Debye temperature and melting temperature. The minimum thermal conductivities and anisotropies of TaX (X = P, As) are calculated. Bond population analysis supports the bonding nature as predicted by the elastic parameters. The bulk electronic band structure calculations reveal clear semi-metallic features with quasi-linear energy dispersions in certain sections of the Brillouin zone near the Fermi level. A pseudogap in the electronic energy density of states at the Fermi level separating the bonding and the antibonding states indicates significant electronic stability of tetragonal TaX (X = P, As).The reflectivity spectra show almost non-selective behavior over a wide range of photon energy encompassing visible to mid-ultraviolet regions. High reflectivity over wide spectral range makes TaX suitable as reflecting coating. TaX (X = P, As) are very efficient absorber of ultraviolet radiation. Both the compounds are moderately optically anisotropic owing to the anisotropic nature of the electronic band structure. The refractive indices are very high in the infrared to visible range. All the energy dependent optical parameters show metallic features and are in complete accord with the underlying bulk electronic density of states calculations.
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Affiliation(s)
- M I Naher
- Department of Physics, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - S H Naqib
- Department of Physics, University of Rajshahi, Rajshahi, 6205, Bangladesh.
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Semari F, Boulechfar R, Dahmane F, Abdiche A, Ahmed R, Naqib S, Bouhemadou A, Khenata R, Wang X. Phase stability, mechanical, electronic and thermodynamic properties of the Ga3Sc compound: An ab-initio study. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108304] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Trad Khodja A, Boulechfar R, Meradji H, Akeb Y, Chemam R, Ghemid S, Omran SB, Khenata R, Wang X. Phase stability, mechanical, electronic, magnetic and optical properties of tetragonal and cubic M 3V (M: Pd, Pt) structures. J Mol Graph Model 2020; 100:107651. [PMID: 32650288 DOI: 10.1016/j.jmgm.2020.107651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/21/2020] [Accepted: 05/22/2020] [Indexed: 11/30/2022]
Abstract
The full potential linearized augmented plane wave (FP-LAPW) method was used to investigate the ground states as well as the mechanical, electronic, magnetic and optical properties of M3V (M: Pd, Pt) compounds. The generalized gradient approximation (GGA) of Perdew-Burke and Ernzerhof (PBE-GGA) is employed to treat the exchange-correlation potential for all the calculations except for structural properties where both Wu and Cohen generalized gradient approximation (WC-GGA) and Perdew and Wang local spin density approximation (LSDA) have been added. The cohesive energies, the formation enthalpies and the densities of states at the Fermi level N(EF) show that the D022 structure is more stable than D023 and L12. The lattice parameter and bulk modulus results agree well with the available experimental measurements and theoretical predictions. The elastic and mechanical properties are predicted and show that both compounds exhibit ductile behavior. Furthermore, our calculations of Debye and melting temperatures are in good agreements with experimental results reported in the literature. The densities of states (DOS) show that strong d-d hybridization is behind the formation of the pseudogap at the Fermi level. The contours of the valence charge densities show combinations of metallic and covalent bonds. The number of bonding electrons per atom nb, the electronic specific heat coefficient γ, and the electron-phonon coupling constant λ, are determined. The obtained values of the magnetic moments and polarization coincide with the reported values for both D022 and L12 structures. Moreover, the optical properties, including the dielectric functions, extinction coefficient K(ω), reflectivity coefficient R(ω) and energy loss function L(ω) are studied in the range of 0-14 eV.
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Affiliation(s)
- A Trad Khodja
- Laboratoire LPR, Département de Physique, Faculté des Sciences, Université Badji Mokhtar, Annaba, Algeria
| | - R Boulechfar
- Laboratoire LPR, Département de Physique, Faculté des Sciences, Université Badji Mokhtar, Annaba, Algeria; Département de Technologie, Faculté de Technologie, Université Du 20 Août 1955, Skikda, Algeria
| | - H Meradji
- Laboratoire LPR, Département de Physique, Faculté des Sciences, Université Badji Mokhtar, Annaba, Algeria.
| | - Y Akeb
- Laboratoire LPR, Département de Physique, Faculté des Sciences, Université Badji Mokhtar, Annaba, Algeria
| | - R Chemam
- Laboratoire LPR, Département de Physique, Faculté des Sciences, Université Badji Mokhtar, Annaba, Algeria
| | - S Ghemid
- Laboratoire LPR, Département de Physique, Faculté des Sciences, Université Badji Mokhtar, Annaba, Algeria
| | - S Bin Omran
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - R Khenata
- Laboratoire de Physique Quantique de La Matière et de La Modélisation Mathématique (LPQ3M), Université de Mascara, Mascara, 29000, Algeria
| | - Xiaotian Wang
- School of Physical Science and Technology, Southwest University, Chongqing, 400715, China.
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Misra D, Yadav SK. Prediction of Site Preference of Implanted Transition Metal Dopants in Rock-salt Oxides. Sci Rep 2019; 9:12593. [PMID: 31467380 PMCID: PMC6715737 DOI: 10.1038/s41598-019-49011-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 08/16/2019] [Indexed: 11/09/2022] Open
Abstract
Transition metals (TMs) implanted in oxides with rock-salt crystal structures (for example MgO and BaO) are assumed to substitute cations (Mg in case of MgO) from the lattice sites. We show that not all implanted TMs substitute cations but can be stable in interstitial sites as well. Stability of TM (Sc-Zn) dopants in various charge states in MgO and BaO has been investigated in the framework of density functional theory. We propose an effective way to calculate stability of implanted metals that let us predict site preference (interstitial or substitution) of the dopant in the host. We find that two factors govern the preference for an interstitial site: (i) relative ionic radius and (ii) relative oxygen affinity of cation and the TM dopants. If the radius of the cation is much larger than TM dopant, as in BaO, TM atoms always sit at interstitial sites. On the other hand, if the radius of the cation is comparable to that of the dopant TM, as in case of MgO, the transition of the preferred defect site, from substituting lattice Mg atom (Sc to Mn) to occupying interstitial site (Fe to Zn) is observed. This transition can be attributed to the change in the oxygen affinity of the TM atoms from Sc to Zn. Our results also explain experiments on Ni and Fe atoms implanted in MgO. TM dopants at interstitial sites could show substantially different and new properties from substitutionally doped stable compounds.
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Affiliation(s)
- Debolina Misra
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600036, India.
| | - Satyesh K Yadav
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600036, India.
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Wen M, Wang CY. Effect of alloying elements on the ideal strength and charge redistribution of γ′-Ni 3Al: a first-principles study of tensile deformation. RSC Adv 2016. [DOI: 10.1039/c6ra13017h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The effect of the alloying elements on the σIT of γ′-Ni3Al along three characteristic directions was investigated using DFT calculations.
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Affiliation(s)
- Minru Wen
- Department of Physics
- Tsinghua University
- Beijing 100084
- China
| | - Chong-Yu Wang
- Department of Physics
- Tsinghua University
- Beijing 100084
- China
- Central Iron and Steel Research Institute
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Hao R, Zhang X, Qin J, Zhang S, Ning J, Sun N, Ma M, Liu R. Theoretical prediction of structural stability, electronic and elastic properties of ZrSi2 under pressure. RSC Adv 2015. [DOI: 10.1039/c5ra01964h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The elastic constants, DOS, charge density distribution and the fundamental thermodynamic data such as the specific heat, thermal expansion coefficient and Debye temperature under different temperatures and pressures are theoretically determined.
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Affiliation(s)
- Ruru Hao
- State Key Laboratory of Metastable Materials Science and Technology
- Yanshan University
- Qinhuangdao 066004
- P. R. China
| | - Xinyu Zhang
- State Key Laboratory of Metastable Materials Science and Technology
- Yanshan University
- Qinhuangdao 066004
- P. R. China
| | - Jiaqian Qin
- Metallurgy and Materials Science Research Institute
- Chulalongkorn University
- Bangkok 10330
- Thailand
| | - Suhong Zhang
- State Key Laboratory of Metastable Materials Science and Technology
- Yanshan University
- Qinhuangdao 066004
- P. R. China
| | - Jinliang Ning
- State Key Laboratory of Metastable Materials Science and Technology
- Yanshan University
- Qinhuangdao 066004
- P. R. China
| | - Na Sun
- State Key Laboratory of Metastable Materials Science and Technology
- Yanshan University
- Qinhuangdao 066004
- P. R. China
| | - Mingzhen Ma
- State Key Laboratory of Metastable Materials Science and Technology
- Yanshan University
- Qinhuangdao 066004
- P. R. China
| | - Riping Liu
- State Key Laboratory of Metastable Materials Science and Technology
- Yanshan University
- Qinhuangdao 066004
- P. R. China
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Wang Y, Wang C. Effect of Alloying Elements on the Elastic Properties of γ-Ni and γ'-Ni3Al from First-principles Calculations. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-1224-ff05-31] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractThe effect of alloying elements Ta, Mo, W, Cr, Re, Ru, Co, and Ir on the elastic properties of both γ-Ni and γ′-Ni3Al is studied by first-principles method. Results for lattice properties, elastic moduli and the ductile/brittle behaviors are all presented. Our calculated values agree well with the existing experimental observations. Results show all the additions decrease the lattice misfit between and γ′ phases. Different alloying elements are found to have different effect on the elastic moduli of γ-Ni. Whereas all the alloying elements slightly increase the moduli of γ′-Ni3Al expect Co. Both of the two phases are becoming more brittle with alloying elements, but Co is excepted. The electronic structures of γ′ phase alloyed with different elements are provided as example to elucidate the different strengthening mechanisms.
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Ravindran P, Subramoniam G, Asokamani R. Ground-state properties and relative stability between the L12 and DOa phases of Ni3Al by Nb substitution. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:1129-1137. [PMID: 9983569 DOI: 10.1103/physrevb.53.1129] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lin W, Freeman AJ. Cohesive properties and electronic structure of Heusler L21-phase compounds Ni2XAl (X=Ti, V, Zr, Nb, Hf, and Ta). PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:61-68. [PMID: 10000152 DOI: 10.1103/physrevb.45.61] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lu ZW, Wei S, Zunger A, Frota-Pessoa S, Ferreira LG. First-principles statistical mechanics of structural stability of intermetallic compounds. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:512-544. [PMID: 9999151 DOI: 10.1103/physrevb.44.512] [Citation(s) in RCA: 126] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hong T, Watson-Yang TJ, Freeman AJ, Oguchi T, Xu J. Crystal structure, phase stability, and electronic structure of Ti-Al intermetallics: TiAl3. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:12462-12467. [PMID: 9993718 DOI: 10.1103/physrevb.41.12462] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Xu J, Min BI, Freeman AJ, Oguchi T. Phase stability and magnetism of Ni3Al. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:5010-5016. [PMID: 9994357 DOI: 10.1103/physrevb.41.5010] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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MacLaren JM, Crampin S, Vvedensky DD. Layer Korringa-Kohn-Rostoker theory for close-spaced planes of atoms. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:12176-12182. [PMID: 9991847 DOI: 10.1103/physrevb.40.12176] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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MacLaren JM, Crampin S, Vvedensky DD, Pendry JB. Layer Korringa-Kohn-Rostoker technique for surface and interface electronic properties. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:12164-12175. [PMID: 9991846 DOI: 10.1103/physrevb.40.12164] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Carlsson AE. Cluster interactions and physical properties of Al-transition-metal alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:912-923. [PMID: 9991910 DOI: 10.1103/physrevb.40.912] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Chubb SR, Papaconstantopoulos DA, Klein BM. First-principles study of L10 Ti-Al and V-Al alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:12120-12124. [PMID: 9946146 DOI: 10.1103/physrevb.38.12120] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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